Power Window problems of the 2000 Mercedes Benz S Class

My major concern is the failure of my accelerator to respond. This could have easily been a fatal accident. I was beginning to enter the interstate and the accelarator simply failed to respond. Immediately got it to the shop and they replaced the pedal valve sender, pedal housing assembly,and input new codes for the pedal valve sensor. I was charged $361. 03. Apparently many of the S Class cars have computer problems and I believe this model should be recalled to check pedal valve sensors and to install a saftey back up of some type. Many people could have already been killed because of this potentially serious problem. The suspension problem centered around the airmatic system. 1st in the shop on sept. 6,2002 mileage 46,521. Second malfunction March 21st. Mileage 53,846. This is when they charged me. Next occurrence April 3, 2003. Mileage 54,150. The dealership eventually refunded $585. 89 of those charges with no explanation how they arrived at that number. Accelerator failed on January 6, 2003 mileage 51,934. I had to take my car to daytona beach, 30 miles away, 10 times in just over 10,000 miles. Daytona beach has been very helpful but my attempts to deal with their corporate office have been meet with a condescending and uncooperative attitude. It is clear that their once terrific image of quality and customer satisfaction is a thing of the past. As information I have shared this information with the USA president of mercedes paul halata. I wrote him on April 3 and again on may 14 since I received no reply. He had a customer service rep. Who answers the phone write me a terrible letter that had the wrong car and wrong VIN. He was the same guy I called when the problems first began who did not return my calls. Nevertheless, the accelerator issue is a serious issue, everything else is just the new way of doing business in America.