 Just came out of a 2012 Infiniti G37 and picked up the C-300 4matic with sport package +other options.  Car is definitely pricey once optioned out.  Car rides great, but no comparison in power to the G37.  if you want to push the car again it does not compare.  It is more luxurious than it is sport even with the sport package.  Has great styling overall.  However for the price you can not sync your key fob to the memory seat system.  MB does not do it.  Infiniti and Lexus do.  Just stupid that you have to hold a memory seat button on a 50k car to get your seat in to position after your wife drove the car last.  Overall though still a great car.  Better value is the Acura TLX with Tech Pkg.