Mercedes built and Mercedes quality! So far I have driven this vehicle 20K miles (city & highway) and am getting an average of 25 mpg. Why we are not adopting diesel technology here in the USA is beyond me, makes much more sense than the Hybrid which can never be economical for the larger vehicle until the battery technology is radically improved. Mercedes service is expensive, they sell the bluetec additive at $50/gal, the same solution (same ISO#) can be bought at Pilot truck stops for $6/gal?
find a place for the spare tire. "Run flat" tires are too expensive and not always readily available. Advice - keep a replacement tire in the garage.