Fitting instructions and technical documents are all PDF files you can download, click to open or right click and choose “save as”.

To view vehicle information click on the cars names and the information will expand.

Instructions

10-325A - Land Rover Harmon Kardon MKi direct input lead

10-625 Speaker cut relay instructions 10-630 Speaker divert relay instructions 10-640 Reverse gear radio mute relay 10-641 Reverse camera power relay

10-651 Nav Amp interface

20-XXX-IGN quadlock CAN ignition wiring diagrams How to use 20-278 and 39-VOL-01 together 20-303 Toyota Landcruiser LC5 amplifier bypass cable 20-307 Volvo XC90 amplifier bypass cable 20-308 Range Rover Sport and Discovery 3 amplifier bypass cable instructions 23-005 and 23-006 2 channel line output converter 23-009-2 2 channel line output converter high level 23-009-4 4 channel line output converter high level

23-229 - Instructions

24-014-24-015 universal quadlock aux in 24-020 Universal ground loop isolator noise filter 24-228 Mitsubishi AUX in

24-260 BMW aux in adapter lead

24-314 Audi MMI 2 Aux in interface 24-520 Bluetooth audio streaming device 25-101CS Vauxhall Insignia for Parrot Ck3000 25-102C RADICAN instructions for Parrot MKI steering controls 25-102L RADILAN for Vauxhall and Saab 25-200C Parrot3100 steering wheel interface 25-400 Parrot Asteroid compatibility table 25-400 Parrot MKi compatibility table 25-400L Parrot Asteroid compatibility list 25-400L Parrot MKi compatibility list 25-502 Quadlock to ISO harness with CAN ignition and illumination 25-509 Volvo S60 V70 & XC 90 PDC interface 25-510 SLIMKEY full instructions rev 1 13 25-513 BMW PDC & Chime interface 25-514 BMW, Peugeot, Citroen, Volvo PDC retention interface 25-516-PDC Slimkey PDC compatibility table 25-517 GM LANbus slimkey instructions 25-517 Slimkey LANbus interface compatibility table 25-520 landrover Discovery III Can service interface 25-521 Landrover FreelanderII Can service interface 25-522 landrover Discovery IV Can service interface 25-523 Citroen Peugeot Fiat Can service interface 25-524 Merc Actros Can service interface 25-525 Ford Can service interface 25-526 Ford CMax Focus3 Can service interface 25-527 Mercedes Can service interface 25-528 Mazda Can service interface 25-529 Nissan Can service interface 25-530 Vauxhall Saab Can service interface 25-531 Renault Can service interface 25-532 Renault Vauxhall Nissan Can service interface 25-533 Skoda Can service interface 25-534 Hyundai Can service interface 25-535 Audi Can service interface 25-536 Volkswagen Can service interface 25-552 -VW Parkview Front integration OEM with Laserline 25-553 PARKVIEW for LASERLINE Instructions 25-555 parkview FRONT_REAR for VW cars 27-300 Volkswagen camera input harness

27-550 VW, Audi, Porsche camera input interface

27-551 Audi MMI camera input interface

27-552 Audi camera input interface

27-553 Mercedes NTG5 camera input interface

27-554 Mercedes NTG4.5 camera input interface

27-557 Volvo Sensus camera input interface

27-558 Lexus camera input interface

27-559 Peugeot Citroen SMEG camera input interface

29-000 Chinese-unbranded patch lead instructions 29-007-3v Pioneer Patch lead for InCarTec steering controls 29-008 Sony Patch lead for InCarTec steering controls 29-009 VDO / Siemens patch lead for Incartec Steering controls 29-025 Universal patch 29-600 Renault 5 ,11,19 21 steering control 29-601 Renault (<00) stalk control interface 29-602 Renault 29-603 Peugeot 405 & 605 stalk control interface 29-604 Peugeot 206 306 4 function stalk control 29-606 Ford (<04) stalk control interface 29-607 Peugeot 206 (99-00) stalk control 29-608 Renault (without separate display) stalk control 29-609 Vauxhall ISO steering control interface instructions 29-609 VauxOpel 29-610 Landrover Discovery 1 stalk Control 29-611 Landrover Discovery 1 stalk control 29-612B Citroen Xantia Steering control 29-612 Citroen Xantia Steering control 29-613 Citroen Xsara steering control 29-614 Peugeot 406 steering control 29-616 Citroen Peugeot Fiat steering control 29-617 Fiat Marea Punto (95-99) steering control 29-618 Fiat Punto Stilo steering control 29-619 Peugeot 206 steering control 29-620 Landrover Discovery Steering control 29-621 Citroen Peugeot Fiat Steering control 29-622 Peugeot 206 6 function steering control 29-623 Landrover Discovery II steering control 29-624 Citroen Picasso Steering control 29-625 MG ZT steering control 29-626 Landrover with oem Becker traffic nav 29-627 BMW round pin steering control interface instructions 29-628HKM 2001-2006 Mini SWC interface with HK retention 29-628 BMW K bus Quadlock steerong control E39, X5 29-629 Honda S2000 Steering control 29-630 Chrysler Jeep Steering control 29-631 Rover 25/45 ( 04-05) steering control 29-632 Saab steering control interface instructions 29-633 Peugeot 406 steering control 29-634 Honda Jazz steering control 29-635 Rover 25/45 (00-02) steering control 29-636 Ford Galaxy steering control 29-637 Suzuki Vitara Steering control 29-638 Audi and Seat 29-639 Kia Sorrento (03-06) steering control 29-640 Citroen Peugeot Fiat Steering control 29-641 Fiat 29-642 Nissan Micra Steering control 29-643 Saab steering control interface instructions 29-644 Nissan X Trail Steering control 29-645 Nissan steering wheel control interface instructions 29-646 Chevrolet Captiva Steering control 29-647 Citroen Peugeot Fiat steering control 29-648 Toyota steering control interface instructions 29-649 Renault Hard wire steering control 29-650 Citroen Peugeot (02-06) VANBUS data steering control 29-651 Alfa Romeo 156 <2003 SWC instructions 29-652 Renault Tuner list Steering control 29-653 Ford Mondeo (99-03) Steering control 29-654 Ford Quadlock cars steering control 29-655-CAN Alfa 29-655 Alfa 156 147 & GT audio steering control 29-656 Mitsubishi Colt Steering control 29-657 Ford Fiesta Fusion (02-06) steering control 29-658 Land Rover 29-659 Range Rover Steering control 29-661-HK Range Rover P38 with HK amp steering control instructions 29-661 Range Rover Steering control 29-662 Ssangyong Steering control 29-663 Honda 29-664 Jaguar X Type steering control 29-665 Landrover Freelander 1 (04-06) steering control 29-666 Citroen Peugeot Boxer Fiat Ducato (06>) Steering control 29-667 Honda steering wheel control interface instructions 29-668 Hyundai Sante Fe (with amp) steering control 29-669 Suzuki steering control interface instructions 29-670 Chevrolet steering control interface instructions 29-671 Nissan steering control interface instructions 29-672 Subaru steering control interface instructions 29-673 Mazda steering wheel control interface instructions 29-674 Nissan (Hard wire) Steering control 29-674 Nissan withConn 29-675 Hyundai / Kia steering control interface instructions 29-676 Kia Ceed Steering control 29-677 Subaru Forrester Steering wheel interface 29-678 Nissan Steering wheel interface 29-679 Honda Insight Accord Jazz 09 steering control interface 29-680 Mitsubishi Colt Audio Steering wheel interface 29-681 Mitsubishi steering control interface instructions 29-681 Mitsubishi07 29-684 Vauxhall/Holden steering interface instructions 29-686 Subaru steering wheel control interface instructions 29-692 Hyundai / Kia steering control interface instructions 29-694 Saab steering control interface instructions 29-695 Toyota steering control interface instructions 29-697 Isuzu steering control interface instructions 29-699 Marine Boat Steering control interface 29-0XX patchleads configuration 29-701 Ssangyong Korando steering control interface 29-703 Freelander2 with Alpine Premium sound 29-711 Ssangyong Korando Sport steering control interface 29-712 Landrover RR Sport and Discovery 3 SWC screen retention interface 29-713 Freelander 2 SWC and PDC with Alpine Premium sound system 29-716 Renault stalk control 29-801 Vauxhall Astra H with settings menu 29-804 BMW 1 3 CAN steering interface 29-805 Peugeot CAN Steering controls 29-806 Audi A4 , A3 TT CANbus steering interface 29-807 Fiat500 CAN bus steering wheel interface 29-808 Citroen C4 Picasso 29-811 Vauxhall Corsa D Steering interface

29-UC-050 Connection diagrams

29-UC-050 Interface installation instructions

29-UC-050 Interface options management instructions

29-UC-REN1-NAV Renault TOMTOM retention interface 29-UC-REN2-NAV Renault TOMTOM retention interface

29-UC050-CHR1 Chrysler UNICAN steering control interface instructions

29-UC050-CHR2 Chrysler UNICAN steering control interface instructions

29-UC050-POR1 Porsche UNICAN steering control interface instructions

29-UC050REN1 Renault UNICAN steering control interface

29-UC050-SAAB Saab UNICAN steering control interface instructions

29-UCCAB Unican interface patch lead data sheet

29-UCCAB-000 Chinese and learning UNICAN patch lead

29-CT-025 Universal patch lead for 29-CT interfaces

39-FIA-01, 02, 03 Fiat CAN steering control interface instructions

39-HU-UNI universal 39- series patch lead instructions

39-MAN MAN lorry CAN steering control interface instructions

39-MB A05, A10, NTG1, NTG2, COM2, UNI Mercedes CAN steering control interface instructions

39-PGA-PDC Citroen and Peugeot CAN steering control interface instructions

39-PO-ISO Porsche CAN steering control interface instructions

39-SCAN-01 Scania CAN steering control interface instructions

39-VOL-01 Volvo CAN steering control interface instructions

39-VOL-FH Volvo FH CAN steering control interface instructions

39-VOL-UNI Volvo CAN steering control interface instructions

39-VW-03 Volkswagen CAN steering control interface instructions

49- patch lead info sheet 49-025 Universal 49- series patch lead 49-AUD-01, 49-AUD-02, 49-AUD-03, 49-AUD-UNI Instructions 49-CORSA-D Vauxhall Corsa D steering control interface instructions 49-MB-04 Mercedes quadlock CAN steering interface 49-PGA-01, -PDC, Citroen and Peugeot steering control interface instructions 49-POR-04 Porsche CANbus steering control interface 49-VW-01 Volkswagen CAN SWC interface instructions 49-VW-02 Volkswagen CAN SWC interface with PDC and climate display 50-693 Ford Focus Double din fitting Brackets Ford Mondeo fascia fitting examples 50-770-BRACKET instructions

50-940 Landrover Defender double din fascia fitting instructions

29-UCCAB patch lead wiring data sheet

FK-860 XC90 fitting kit instructions

M-S5.0 universal dash top monitor

25-553 Parkview activation 25-500 Compatibility List 25-510 and 25-511 Slimkey I and II compatibility table 29-UC-050 CAN CAR PIN POSITIONS for UNICAN
Vehicle information, click car name to expand.

Porsche 911 (996)

Production years 1997 - 2004


1997 to 2004 model Porsche 911 and Boxsters have two original audio systems.

The earlier cars had a system similar to an Audi, the speakers are amplified and the head unit suppliers the audio to the amplifier via a low level signal from the Mini ISO connector. These cars require high to low level adapters to fit new head units or handsfree kits.

Later models use a fibre optic network to send the audio signal from the head unit to the amplifier. For these cars, the original amplifier needs to be bypassed. There are no plug and play amplifier activation or bypass products available.

Generally the CD22/CDR22 original units have the Audi style system, CDR23 units can be either low level like the Audis or fibre optic. It is best to either find the amplifier under the front bonnet and look for fibre optic cables, or remove the head unit and look at the connection on the back.


Here is a picture of a car using a low level signal in the Mini ISO yellow connector to connect to the amplifier, note that all six positions are populated. These wires are the positive audio signals for front left, front right, rear left and rear right speakers, a common speaker negative and the amplifier turn on signal.


Here is a picture of a head unit using the fibre optic connection. Note that there are only four wires in the yellow Mini ISO, unlike six in the older version. These four wires are data wires, they do not carry any audio signal.



There are some cars with the very basic audio option, these have a traditional speaker ISO connector with the head unit driving the speakers directly. No audio adapters are needed for these cars.

BMW 1 Series
E81 3 door hatchback, E82 2 door coupe, E87 5 door hatchback, E88 2 door convertible.

Production years 2004-2011


The BMW 1 series had a facelift to the dashboard in 2007, this facelift allowed for the possibility of fitting double DIN aftermarket head units.

Below shows the difference between the pre and post facelift dashboards.


BMW 3 Series E46

Production years 1999 - 2006

The E46 is the forth generation of the popular 3 series BMW car.


There are several options of original audio systems in these cars.

Basic Audio. The basic audio systems have a standard tape or CD player head unit in the dashboard. Some older models also have a basic small text screen based navigation display.
These basic setups will have a 17 way round pin connector at the back of the head unit.
Some cars with the basic head units will also have a Harman/Kardon amplifier.

Basic with Harman/Kardon. The Harman/Kardon amplifiers are turned on by a 12v switch signal. The head unit sends the audio to the amplifier via a low level (pre amplified) signal.
Fitting new head units or handsfree kits will require high to low level audio adapters.

Navigation screen head unit. Cars with original navigation screens have the radio tuner module in the rear of the car, it is behind the left hand panel in the boot. There are two types of tuners, one has the 17 way round pin connector and the other has the 40 way quadlock connector.
It is a 10-15 minute job to remove the panel in the boot and locate and identify which type of tuner is in the car. Pictures of the units are below.

Navigation and round pin tuner. The cars with round pin tuners work on the same basis as the cars with the basic head unit and basic head unit with Harman/Kardon. The main difference is that the tuner unit and round pin connection is in the boot so extensions from rear to front are required.

Image of the round pin tuner module. BM23.


Navigation and quadlock tuners. Like cars with the round pin tuners, cars with the quadlock tuners will require extensions from rear to front with the appropriate connectors.
Cars that have the quadlock tuners and Harman/Kardon amplifiers are more complicated. The amplifiers are digital (DSP) and therefore need to be bypassed in order to install a new after market head unit. The same wiring and extension leads are required but no audio will be supplied to the speakers using these parts.

Image of the quadlock tuner module. BM54.


Nissan 350Z

Production years 2003 - 2010


The Nissan 350Z have a facelift in 2006 which affects the radio fascia. It is a very minor difference in the fascias needed from the pre facelift to post facelift models.

The easiest way to tell if the car is the older or newer model is to look at the styling around the gear stick and the location of the hazard switch.

In the picture above you can see the different styling around the gear stick and the position change of the hazard switch.

The left image is of the 2003 - 2006 model, the hazard switch is positioned further back near the handbrake, the 2006 - 2010 model on the right has the hazard switch further forward on the dashboard located between the gear stick and below the climate controls.


Bose integration.
Most 350Z cars have factory fitted Bose audio systems. New equipment like head units and handsfree kits can be easily added to this system using high to low level adapters. The original head unit supplies the audio to the amplifier via a low level signal.

When fitting a new head unit, sometimes the audio sounds quieter than expected, this is normally caused by the new head unit having 2V preouts. Head units with 4V preouts will provide better audio. Another way to get better audio is to use an adapter lead for a non amplified car, use the ISO speaker outputs from the head unit and run the audio through a high to low level interface, this will give the best audio quality.


The Bose amplifier is turned on by a 12V switch signal.

This diagram shows the position of the amplifier turn on (AMP ON) pin. Use the 12V switch output from the new head unit (blue/white wire) to turn the amp on.

The original A3 (or Typ 8L) was introduced in the European market in 1996, marking Audi's return to the production of smaller cars following the demise of the Audi 50 in 1978. This was the first Volkswagen Groupmodel to use the "PQ34" or "A4" platform, bearing a close resemblance to the contemporary Volkswagen Golf Mk4, which arrived a year later. Within three years, this platform was used for total of seven cars.

The A3 was initially available only with a three-door hatchback body, to present a more sporty image than the Golf, in both front and four-wheel drive. The inline four-cylinder engines were transversely mounted. After the A4, the Audi A3 was the second model in the Audi lineup to use five valves per cylinder.

The United Kingdom market first received the Audi A3 in November 1996.

In 1999, Audi expanded the range with the introduction of more powerful versions: a 1.8 turbo rated 180 PS (132 kW; 178 hp), and a 1.9 TDI diesel engine with unit injector "Pumpe Düse" (PD) technology and variable geometry turbocharger. The four-wheel-drive A3 1.8T quattro used either the 150 PS (110 kW; 148 hp) or 180 PS (130 kW; 180 hp) engine, and the same Haldex Traction-based four-wheel-drive system as the Audi S3 and the Audi TT. Also in 1999, Audi also introduced a five-door body.

In late 2000, the A3 range was revised with new headlights and rear lamps, other minor cosmetic changes, an improved interior, and the introduction of a six-speed manual gearbox, on the 180 PS (132 kW; 178 hp) 1.8 Turbo and the new 130 PS (96 kW; 128 hp) 1.9 TDI.

Audi's electronic stability control, traction-control, and brake force distribution computer became standard equipment in some countries.

Although the first-generation Audi A3 was replaced in Europe in 2003, the first generation model continued to be sold in some markets. Production of the first generation model stopped in Brazil in 2006.

Audi A7 (4G8)

Production years 2010 - 2017


The Audi A7 was first released in 2010. There was an update to the car in 2012 and a further facelift in 2015 which included a new multimedia system.

Porsche Boxster (986)

Production years 1997 - 2004


1997 to 2004 model Porsche 911 and Boxsters have two original audio systems.

The earlier cars had a system similar to an Audi, the speakers are amplified and the head unit suppliers the audio to the amplifier via a low level signal from the Mini ISO connector. These cars require high to low level adapters to fit new head units or handsfree kits.

Later models use a fibre optic network to send the audio signal from the head unit to the amplifier. For these cars, the original amplifier needs to be bypassed. There are no plug and play amplifier activation or bypass products available.

Generally the CD22/CDR22 original units have the Audi style system, CDR23 units can be either low level like the Audis or fibre optic. It is best to either find the amplifier under the front bonnet and look for fibre optic cables, or remove the head unit and look at the connection on the back.


Here is a picture of a car using a low level signal in the Mini ISO yellow connector to connect to the amplifier, note that all six positions are populated. These wires are the positive audio signals for front left, front right, rear left and rear right speakers, a common speaker negative and the amplifier turn on signal.


Here is a picture of a head unit using the fibre optic connection. Note that there are only four wires in the yellow Mini ISO, unlike six in the older version. These four wires are data wires, they do not carry any audio signal.



There are some cars with the very basic audio option, these have a traditional speaker ISO connector with the head unit driving the speakers directly. No audio adapters are needed for these cars.

Porsche Boxster/Cayman 987

Production years 2005-2012


The Porsche Boxster (convertible) and Cayman (coupé) have several different setups for the original audio systems. Earlier models from 2005 to 2008 had the CDR24, PCM2 or PCM2.1 systems. The CDR24 was the basic head unit, the difference between the PCM units is the PCM2 has a CD player and the PCM2.1 has a DVD player. All these head units have ISO connectors at the rear.

Below are examples of the CDR24 and PCM2/2.1 original units.



There are also several amplifier options with these cars, non-amplified, non-Bose and ASK amplifiers or BOSE amplifier.

Cars that are non-amplified will have speaker wires in the ISO connector at the rear of the head unit. Non-Bose amplified cars normally have either all or some speaker wires in the ISO connector, the amplifier requires a 12V switched turn on signal. Sometimes this is shared with the antenna turn on wire, sometimes it is an additional wire in the power ISO.

Cars with Bose will have no speaker wires present at the head unit, the audio signal from the head unit is sent to the amplifier via fibre optics, a special interface is required for these cars or the amplifier will need to be bypassed or replaced.

Below are images to show different original wiring configurations.
1 is a car with 4 speaker channels in the ISO connector. 2 is a car with only 2 speaker channels in the ISO connector. 3 is a car with no speaker wires, the audio is transferred on the fibre optic cables.




From 2009 to 2012 the car was facelifted. The noticeable change is the colour of the dashboard, it has changed from silver to black and the original head unit options have been upgraded. Facelift models have either a CDR30 or PCM3 audio system.

Below are examples of the CDR30 and PCM3 original head units.



The CDR30 and PCM3 units also have quadlock connectors at the rear, replacing the ISO connectors on the older models. Similar to the older models with ISO, there are different amplifier options for these cars, some using speaker level outputs from the head unit and some using a fibre optic connection from the head unit to the amplifier.

Below are examples of the quadlock wiring.
1 is a car with 4 speaker channels in the quadlock and no fibre optic cables. 2 is a car with fibre optic connections for the audio and no speaker wires in the quadlock.



Porsche Boxster/Cayman 987

Production years 2005-2012


The Porsche Boxster (convertible) and Cayman (coupé) have several different setups for the original audio systems. Earlier models from 2005 to 2008 had the CDR24, PCM2 or PCM2.1 systems. The CDR24 was the basic head unit, the difference between the PCM units is the PCM2 has a CD player and the PCM2.1 has a DVD player. All these head units have ISO connectors at the rear.

Below are examples of the CDR24 and PCM2/2.1 original units.



There are also several amplifier options with these cars, non-amplified, non-Bose and ASK amplifiers or BOSE amplifier.

Cars that are non-amplified will have speaker wires in the ISO connector at the rear of the head unit. Non-Bose amplified cars normally have either all or some speaker wires in the ISO connector, the amplifier requires a 12V switched turn on signal. Sometimes this is shared with the antenna turn on wire, sometimes it is an additional wire in the power ISO.

Cars with Bose will have no speaker wires present at the head unit, the audio signal from the head unit is sent to the amplifier via fibre optics, a special interface is required for these cars or the amplifier will need to be bypassed or replaced.

Below are images to show different original wiring configurations.
1 is a car with 4 speaker channels in the ISO connector. 2 is a car with only 2 speaker channels in the ISO connector. 3 is a car with no speaker wires, the audio is transferred on the fibre optic cables.




From 2009 to 2012 the car was facelifted. The noticeable change is the colour of the dashboard, it has changed from silver to black and the original head unit options have been upgraded. Facelift models have either a CDR30 or PCM3 audio system.

Below are examples of the CDR30 and PCM3 original head units.



The CDR30 and PCM3 units also have quadlock connectors at the rear, replacing the ISO connectors on the older models. Similar to the older models with ISO, there are different amplifier options for these cars, some using speaker level outputs from the head unit and some using a fibre optic connection from the head unit to the amplifier.

Below are examples of the quadlock wiring.
1 is a car with 4 speaker channels in the quadlock and no fibre optic cables. 2 is a car with fibre optic connections for the audio and no speaker wires in the quadlock.



Skoda Fabia mk2 5J

Production years 2007 - 2014


The second generation Skoda Fabia was produced from 2007 to 2014. Nearly all cars have the Volkswagen double din radio (sometimes branded as Skoda Swing, Dance, Bolero), however, there are a very small amount of cars that have a smaller Skoda Beat head unit, these cars with the Beat head unit require a different fascia panel, only a single din radio can be installed, a double din will not fit. Both the Volkswagen style units and the Beat unit use a quadlock connector at the back of the radio.


The ford Fusion was launched in 2002 and ran until 2012.
Like the Fiesta, around 2005/6 there was a facelift.
Earlier models have the three section radio in the dashboard, the dashboard requires cutting in order to install an aftermarket, later models had the large 6000CD headunit.

Renault Megane III

Production years 2008 - 2016


The third generation of the Renault Megane had a facelift in 2012. The earlier models have quadlock connectors at the back of the radio, facelift 2012 models have the newer Renault/Dacia style white radio connectors. For cars around the facelift change it is best to remove the head unit to check what type of connector has been used.

It is not possible to fit a double din head unit into a Megane III.

Mazda MX-5 NC (Miata) third generation

Production years 2005 - 2015


The third generation Mazda MX-5 was produced from 2005 to 2015. There was a facelift at the beginning of 2009.

It is very difficult to identify the pre and post facelift models from looking at the radio alone as they are almost identical, there are subtle changes to the moulding which do mean different fascia panels are needed when changing the head unit. The easiest way to identify the facelift change is by the styling change of the fog lights as shown in the image below.


Volkswagen Polo mk IV (9N) forth generation

Production years 2002 - 2009


The forth generation Volkswagen Polo had a facelift mid production around 2004. The earlier models had original tape cassette headunits with optional CD changers, these cars had ISO connectors at the back of the radio. The later facelift models have a double DIN sized original CD player head unit, these later models have a Quadlock connector at the rear of the radio.

It is very easy to differentiate between the pre and post facelift models by looking at the headlight styling, see the below picture.


Volkswagen Polo mk IV (9N) forth generation

Production years 2002 - 2009


The forth generation Volkswagen Polo had a facelift mid production around 2004. The earlier models had original tape cassette headunits with optional CD changers, these cars had ISO connectors at the back of the radio. The later facelift models have a double DIN sized original CD player head unit, these later models have a Quadlock connector at the rear of the radio.

It is very easy to differentiate between the pre and post facelift models by looking at the headlight styling, see the below picture.


Mercedes SL R230

Production years 2002 - 2011


The Mercedes SL had a facelift after 2004. The dashboard changed and this affects the way a new radio is fitted.

The older pre facelift models had a single large dashboard panel that surrounded the radio and the climate controls. The later models had a split panel that surrounded the climate controls but the radio was wider and filled the top half.



The above picture shows the pre facelift dashboard, see how the original silver dashboard panel surrounds both the climate controls and the radio.

The below picture is of a post facelift car, the dashboard panel is cut off and the radio is larger to fill the top half.

When fitting a radio into the pre facelift model, the dashboard panel will need to be cut in half to mimic the original panel for the post facelift car. This will allow our fascia panel to fit.


Mercedes SL cars have fibre optic audio systems. The head unit communicates to the amplifier and tuner module on a fibre optic network. Because of this there are no plug and play adapters, the CANbus steering control interfaces need to be hard wired and the audio amplifier needs to be bypassed.

Mercedes SLK R171

Production years 2004 - 2010


The 2004 - 2010 model SLK had a change to the steering wheel around 2007/2008. This change meant that the wiring configuration at the back of the radio was also changed.

The earlier models have the Audio20 NTG1 style wiring, the same as an E-Class. The later models have the Audio20 NTG2 style wiring, the same as a C-Class.

The Audio20 NTG1 wiring has only the power and ground wires in the main quadlock section, the CANbus wires and antenna turn on wire are located in the insert accessory position. Also the speaker wires are paired differently to a traditional quadlock. The Audio20 NTG2 has the power, ground, CANbus wires and antenna turn on wires all in the main quadlock section and the speaker wires are paired like normal.

An easy way to tell the difference between the older and newer wiring styles is to look at the steering wheel buttons. The older models with NTG1 wiring have individual silver buttons on the steering wheel. Newer models with the NTG2 wiring have the buttons in circular clusters.

Above is an example of the steering wheel of a car with the older NTG1 style wiring.

Below is an example of the steering wheel of a car with the newer NTG2 style wiring.


Skoda Superb mk2

Production years 2008 - 2015


Most Skoda Superb cars have the Volkswagen style head unit, however, there are some models with a different style radio. 

If the car has this style of radio (pictured below), you will need to get the original radio surround panel from a Skoda dealership in order to convert the dashboard to the Volkswagen style dashboard.

Style of radio that requires a new surround.


Pictured below is the Volkswagen style dashboard. Using this radio surround you can then use the VW style fascia adapter to fit a new radio.

Original Volkswagen style radio.

Audi TT 8J mk2

Production years 2006-2014


The differences from the first to second generation Audi TT are easy to see. Updated vehicle styling and a larger than double din radio replaces the single din sized radio from the older model.

Many second generation TTs have the high end Bose amplified audio system, although many TTs don't have the Bose branded system, all second generation TTs have fully amplified audio systems, unlike other Audi cars like the A3 and A4 which have rear amplified systems as standard.

The amplifier in the TT is turned on with a 12V switch signal, cars with original navigation systems use a CANbus turn on signal for the amplifier instead. Using our CANbus steering control interface this will turn on the amplifier. It is also possible to change the amp turn on back to a 12V signal using VAG-COM VCDS.


Audi TT radio wiring diagram.

The DSP EIN position is the amplifier turn on signal.

Although the front speakers are marked on the diagram, the wires are not present in the vehicle.

Skoda Yeti

Production years 2009 - 2017


Skoda Yeti cars have two different shapes of original radios. The two different shapes can be a variety of different specification units from basic, to media and navigation units.

See the pictures below to help identify the radio shapes.


The above radio is wider and is the same as the Octavia radio.

The below radio is narrower and is the typical Volkswagen style radio.


Check the size and shape of the original radio to make sure you are using the correct fascia adapter panel.


Earlier 2009-2014 models have the traditional 40 way quadlock connector at the rear of the radio. 2014 onward facelift cars have the newer style VW/Skoda radios with the new 52 way quadlock connectors. These new connectors have an extra insert section and large power and ground terminals.

The newer models can be identified by the styling of the buttons either side of the radio, they are aligned to the top edge of the radio screen and have a tapered design on the bottom buttons.

See the pictures below showing the newer style radios and the button styles highlighted. These radios still use the same style/shaped fascias as the above pictured older radios.


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