Seat cover cracking and opening up at seams. I purchased a new Mercedes Benz 350E in 2011. Manufacturer's sales literature explained that they try the seats over 300, 000 to insure that they are functionable and lasting for the many years that owner uses his car. I have owned my new Mercedes 350E in 2011. I estimate I made a maximum of 8.400 trips. Yet, the driver seat is already cracking and the seams are opening. I weigh 185 lbs. so the seat was not used out of the ordinary. And I am the sole driver. Seat cover cracking and opening up at seams.