 I am dissapointed with the quality of the C320 overall.  For example, the driver and passenger seat control module failed resulting in an out of warranty cost of $827.00.  The valve cover gaskets need replacing at 55K miles.  The driver's window switch needs replacing.  The thrust arm bushing is cracked.  The driver's grab handle needs to be replaced.  This car is driven by my wife and only has 55K miles.  In fact, last year we only put about 5K miles on the car.  We have had 2 other Benz and this may be the last one we own. The quality lacks a lot to be desired from what we experience in our other 2 Mercedes Benz.  