Guten tag Markus,
When identifying CSL cars, it's always a good start to compare the deviations, from when the cars left the factory, and todays state of the car. Also, to compare "before and after renovation" photos.
In this case, the black mid-section of the rear bumber was immediately recognized (original from factory = chrome).
First of all, not many 4355- bats are in Taiga (4x). Secondly, only one had black mid-section of the rear bumper also before the latest renovation - et voila - case solved.
The magic world of the CSLs always involves some "investigation-work" and references such as original BMW documentation, Presse Mappen, Werks Fotos, Internal BMW/Motorsport documents etc from the 70s.
It's a fascinating "work", but not always logic and straight-forward (happy 70s!).
What I have learnt during the years, is that there are a lot of deviations from the "official" CSL deliveries in terms of equipment, options and "special orders" etc.
How's the progress with your CSL-cars?
Gruss
Henric