My first Mercedes and I'm very impressed. Test drove a 2006 E320 CDI last year and the difference between the 2006 and the 2007 model is substantial. The 2007 is much more quiet both inside and out. The torque produced by this engine is amazing. Considered a Lexus GS but this Mercedes just presented a more luxurious profile to me. The dealer I purchased from also installed the 18" 10-twin-spoke rims which really made this car stand out.
Engine torque, mileage, interior fit and finish, appearance.
Lack of comprehensive option bundles still leave a multitude of features "a la carte."