* Mercedes-Benz makes performance cars, but not traditionally "muscle cars" in the American sense: Muscle cars are typically defined by their large, powerful V8 engines, rear-wheel drive, and often a focus on straight-line speed. While Mercedes does make powerful cars with V8s (and even V12s!), their emphasis is usually on luxury, handling, and overall performance across a range of driving conditions, not just dragstrip speed.
* Examples of Mercedes performance cars: Think of the AMG line, like the C63 AMG, E63 AMG, or the monstrous GT Black Series. They pack serious horsepower, but they're more about handling and all-around performance than just raw power.
* Exceptions: Mercedes did briefly make a muscle car-ish model in the 1970s, the 450SL. It had a large V8 and was marketed as a sporty coupe, but it lacked the pure power and focus on straight-line speed that define a typical muscle car.
So, the answer is a bit of a "no" but with a lot of "buts". Mercedes makes high-performance cars, but they generally don't fit the classic definition of a muscle car.
