I beg to differ.
The car has the three-pointed star on it and it is a Mercedes, regardless of who tuned it.
A few years ago, Mercedes used a push-rod engine to win the Indy 500. The engine had nothing to do with Mercedes (I believe it was built by some company here in Michigan). But after Mercedes won, it was all over the place and its sales jumped. If I had to guess, it must have been in the 94 or 95 era as it somehow coincided with the new C-class, if I remember correctly.
Credit or responsibility, take it, Mercedes, as the car has your badge.