The MAN TGE is a badge engineered version of the 2nd generation Volkswagen Crafter.
Installation depth issues
Due to the shallow depth behind the 2017 onwards VW Crafter, there is only space for a Single din radio chassis or a slim chassis/ modular head unit (maximum mounting depth for the aftermarket radio of 55mm). These units must have the single din body relocated to the top of the monitor because in the crafter the single din hole is at the top, the lower part is not din depth and would not allow you to mount a traditional double din radio.
Careful attention needs to be paid to the radio that is to be fitted and the modifications that may be required, either to the fascia kit or the vehicle.
We strongly recommend the installation is done by an experienced car audio technician only
See the image below that shows the available space behind the original radio