Since the M1 was already posted, I will suggest my next favourite car from the German car maker ,
the (E24) 635 CSI, winner of the 24h race of Spa in 1985, crewed by Ravaglia, Berger and Surer.
I just love the specific livery of the car.
I know it will not be a contender for the first places, but I still do not believe it deserves so few "likes".
A very nice link with a lot of photos and a few facts here