I have owned my Merc clk 240 (2004 W209) for 4 months. During this time I have found myself in the following position...whilst driving the car has lost gear. There is no shudder or jump just nothing on the accelerator. The car still shows as being in D (drive), it won't 'knock' up or down back into gear, I have had to pull over, stop re select drive and I'm away again. Only happened 3 times in 4 months but not good. Am I doing something wrong, is this a problem others have had. Thanks for any advice.