Welcome to Benzforum. I am not a Tech, but I've read elsewhere some things you may want to try. 1. There is a kit called a K-1 Accumulator spring kit, which may help your problem. The kit is less than three dollars at your local dealer, I think the part number is 126-270-44-77, but have them verify this is correct for your car. I'm told this is an easy installation, but I've never done this before myself. Save your old parts, as you will need them again if you rebuild the Tranny. 2. While you are making this change, it's a good time to change the Filter and the fluid(don't forget to drain the Torque Converter). 3. There is always a possibility the modulator valve could need adjustment. 4. If number 1, 2, and 3 don't fix the problem, you may be looking at a tranny rebuild. Item number 1 above has fixed this problem for others, and hopefully will resolve your issue. Keep us posted.