So yeah, the F1 cars are pretty awesome. It’s like a collection of the cars he drove, way down to the Jordan. Also a collection of his helmets and some gloves. The cars look pretty authentic, although the tobacco sponsors have been removed. The cars by itself are pretty awesome, well maintained. They have some wear and tear, so they might be the real chassis.
The museum itself is not so much a museum as it is a fancy car dealer. So besides the F1 cars its not really worth it. Some old cars mainly Porsches and Benzes for sale. Also some Lamborghini’s and bikes. But then again you can walk in for free, so if you’re in Cologne, definitely go visit. But I wouldn’t go out of my way to go there tbh.