I bought this car new and I have had no problems. The best feature about this car is the powerful V6. It makes passing on 2 lane roads quick and easy. The outstanding suspension smooths out potholes yet is taut enough to tear through mountain passes. The interior is businesslike and neat. The seats are comfortable enough to travel for around 2 hours, but cross country trips are quite uncomfortable. The controls are well placed, but the radio is hard to use when moving. The trunk is big enough for luggage for 4, and the back seat holds 2 adults comfortably. The only problem with the car is, with the big engine, it has a tendency to understeer, but this can be fixed by power induced oversteer.
The looks, the torquey motor, the outstanding sound system, and the soft leathers. The fuel economy is one of the best things (25 mpg)
Mercedes should've not put the 132 mph governor, and made it possible to completely disable the stability control. Also, more supportive seats would be great.