Just back from the dealer. I asked to put in a pollen or microfilter to keep the bad stuff out of my car.
builddate of the car is 03/90, but it's a 1991 with the M50 engine. NO A/C.
Seems that they can not put in such a filter and BMW doesn't make them for E34's from before 1991 (build date).
SO, does anybody now some aftermarket filter that can be used?