I have the same BC push button on my turn signal lever 91 535i. I
have just refurbished the air intake and sealed the oil leak and now I
turned my attention to the cockpit controls. I didn't see any
response from this BC button...I will have to try it again...maybe
there is a fuse blown in the fusebox?
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.