I recently had a car audio "specialist" change out my BMW stereo with a Kenwood so that I could hook up my iphone and everything seemed to go well. I have a 320D SE...
Unfortunately, the steering wheel audio controls don't work and when I asked the "specialist" about this, he said it was most like a blown fuse but that he would check whether the unit Kenwood supplied needed to be activated.
Well, I heard nothing and so resolved to change the fuse myself. Doing a bit of research, the Kenwood steering column adaptor should just work once connected.
However, I nearly reversed into a wall prior to changing the fuse as low and behold, the rear parking sensor is no longer working. I opened up the glove box and checked the wiring diagram. It looks to me as though the fuse is not the same for the PS and steering controls so I'm reluctant to believe the problem is with the fuse (unless the audio guy was REALLY ham-fisted).
Does anyone have any ideas? Since I live in Ireland, I want to hold off taking it to one of the local BMW dealers (they wear masks by day!) so any thoughts would be greatly appreciated.