I needed a car that could get me to work in bumper-to-bumper traffic, and also handle periodic days at the race track. I cross-shopped the Audi S4 and the BMW M3. It was a close call, but I have no regrets picking the C32. Very, very fast, but not very flashy. Good MB quality and reliability.
Engine - so powerful. Transmission is great for an automatic.
Narrower front tires make the car handle poorly (understeers). I've already upgraded wheel/tire size. This car should have had a limited slip differential. Way too much power to pump through one wheel! Shame on AMG.