Come to think of it, we buy cars for different reasons. BMW is known for its superb driving dynamics with its RWD platform.
As for Audi, its front heavy FWD platform is not a good configuration to start with but u cannot deny that it has good interior, at times better than BMW..
As for Merc, it is catching up with the younger generation with renewed zest. Have to give them credit for the rather nicely designed C class...
If I can afford, I'll have all 3.. hahahaha...