For the first one, unless it is/was Herbert or Josef Schnitzer's own car (as in the 'Netzer' Dino?) must be some really 'stealthy' Schnitzer BMW as I don't see anything 'tuned' in this car - the little decal doesn't look like a Schnitzer logo either. Very comprehensive site www.e12.de has nothing on this either. Perhaps original contributor knows something about this car we don't.. hmm

As for the second one seems no one sees the period standard base-version E28 plastic hubcap on this wheel but me