I had the seat problem( driver and passenger seats) in a 2000 E430 4matic with 30,000miles on it. After researching the problem on the web I was able to convince my dealer with print outs it was a factory defect. The fix was to replace the entire seat frame which required the car to go to an upolstery shop. MB gave me a rental car since the dealer couldn't have the car done in one day. I was very pleased with the job and the seats (driver and passenger) no longer click on acceleration and braking. MB knows this problem exists in the 210 line and will take care of the problem if you persist.....