Normally, when changing the seatbelts with genuine ones, the installation process can get a little complicated, because coding is required, as the upgrade also changes the seatbelt mechanism.
In this case, my customer went for some beautiful looking aftermarket seatbelts, keeping the original mechanism and significantly decreasing costs and installation time.
As for the genuine air balance, had to modify the glovebox compartment, in order to have the place for Fragrance System Housing.
Remember to check out my iCARMIX page for more :
https://icarmix.com/?s=W464+G63&post_type=product