GAD-Motors pulled off the swap and the icing on the cake is the addition of the 4MAtic AMG powertrain. They also gave it upgraded turbochargers. Yes, this is a twin turbo V8 all wheel drive C-Class. Essentially it mimics the E63 AMG S although with less weight due to being based on the C63 AMG Black Series. The result is a car that moves very well as is shown in the video below against a stock 991 Turbo S which itself is no slouch. The 10 second 911 Turbo just gets demolished.
All this does though is make BenzBoost yearn for an M157 V8 paired to a lighter chassis. This does highlight the problem for Mercedes-AMG though as a C-Class with the M157 is just going to annihilate everything else in the lineup at least in a straightline. Apparently Mercedes had enough of C63 AMG owners tuning their cars making them much faster than the other 63 AMG's in the lineup with software alone.
Enjoy the race video although like most race videos from the Middle East the video quality is incredibly poor for whatever reason. Expensive top notch cars yet cheap low end video equipment, you make sense of it.