My car is doing the EXACT same thing. I have an Arizona
car with no corrosion on it. I pulled apart the fuseable link and the link looks perfect. Under the seat, driver's side, there are relay modules and fuses. I tried changing the General Relay module and all the 30 amp fuses surrounding it. No change. Plus, it is intermittant. Comes and goes. At night, the illumination of the light switch cluster goes on a steady flicker. Prior to this PITA, when it rains, sometimes the electric central door locks stopped working. Now this. One of us will figure it out then we'll both know! I e-mailed to BillR and have tried all he suggested. It HAS to be relay related. Or a bad contact somewhere.
Keith in Scottsdale, AZ
'91 535ia 220K Alpine/Parchment
'89 735il 252K Cirrus/Parchment
'00 740il 124K Oxford/Sand