Hello all, first off if this question has been posed already please point me to the original thread. So my question: has anybody with the base audio system that comes with the w205, been able to add deck speakers to the rear? I'm aware that the upgraded system that comes from factory has those deck speakers built into the car but, would it be possible to buy the deck that comes with the speakers and the wiring all together and fit it into the car with proper coding? If so what is the part number for the wiring?

Thanks in advance.