I have owned the car since new. In mainly city driving with some long distance trips, I have averaged 21.4 mpg over 13,500 miles. The only repair was a fuel filler door that did not lock. The car has been very dependable and is a comfortable long distance cruiser (up to 28 mpg on the highway). 4matic is great in the snow even with the standard all season tires. My main complaint is that the engine lacks low end punch. Once on the highway, performance is acceptable but not thrilling. If you want performance, don't buy the 240, move up to the 320. (I did not like the 230 because of the compressor whine; simply a matter of taste.) Headroom improves significantly without the sunroof.
Solid handling; smooth, quiet highway ride (feels planted like a larger car and is not affected by cross-winds or semis); heated seats and 4matic.
More engine power; quieter climate control fan at start up; front spoiler hangs low and requires caution when parking; side mirrors are too small.