there are actually plenty of aftermarket bits for the car, what are you complaining about?? but remember its a MUCH newer model than the C34 so of course it wont have as much aftermarket support. and as for not having interchangable parts, what did you expect?? THEY ARE DIFFERENT CARS!!!!! if you dont like the tv screen incompatability, dont get one with tv. problem solved!
and +932842734523 on how awesome m35s are. ive never looked back, the only thing im not 100% happy with is that they is no manual option. but i drive in the city mostly so it doesnt matter anyway.........