Driver's side seat back, left bolster, started to smoke and burned a dime size hole in the leather seat cover. Driver's seat heat was on at the time. Turning the seat heat off seems to have solved the problem temporarily. Suspect short in seat heat wiring. Potential fire hazard!

- Raleigh, NC, USA

Seat control module failure. 2 modules per car, 1 for passenger seat, and 1 for driver seat fail. The defective seat control module unit will deplete the cars battery overnight resulting in a no-start condition the following day. A new battery, or a jump start, will get the car going again. The common immediate resolution is to unplug the seat control module which would impact the seats ability to respond in an accident. The replacement part and diagnosis from mb dealer is approx $700/ module. This is a huge liability for Mercedes owners and the repair should be investigated for seat function safety. I understand the part number has been updated, which I believe is an admission by Mercedes that the original part is defective.

- Trabuco Canyon, CA, USA

The contact owns a 2005 Mercedes Benz Clk500. The contact stated that when the driver seat was folded forward and backward, it would lock electronically and caused all other electronic functions for that seat to fail; the contact was concerned that the driver side frontal air bag would fail. The failure occurred intermittently and the vehicle was taken to an authorized dealership six times. The dealer replaced the driver seat rails, frame and made all other necessary adjustments but the failure continued. The manufacturer advised the contact to take the vehicle back to the dealership. The failure mileage was 0. the current mileage was approximately 60,000.

- Pensacola Beach , FL, USA