TL* THE CONTACT OWNS A 2013 MERCEDES BENZ GL450. THE CONTACT STATED THAT WHILE OPERATING THE VEHICLE, THE REAR SECTION WOULD BOUNCE UP AND DOWN VIOLENTLY DUE TO A FAULTY REAR AIR SUSPENSION. IN ADDITION, AN ELECTRICAL BURNING ODOR WAS PRESENT INSIDE THE VEHICLE AND THE ARM REST WAS EXTREMELY HOT TO THE TOUCH. THE CAUSE OF THE FAILURE WAS NOT DETERMINED. THE LOCAL DEALER AND MANUFACTURER WERE NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 87,500.