 After an initial week in the shop for a faulty headlight and electrical faults, very dissappointed.  The vehicle is bearish, unrefined and very uncomfortable even for a "sports car".  MB tried to produce a refined sports sedan but sadly accomplished a choppy, ill mannered and very uncomfortable "luxury" sedan with lots of horse and foot pounds and no way to fully enjoy the performance of such.  Steering is numb and ride is harsh, noisy and busy.  In comfort mode acceleration has an off putting lag.  Performance seats are hard and uncomfortable.   I expected much more for this price.