The contact owns a 2007 Mercedes-Benz GL450. The contact stated that while her husband was driving at an undisclosed speed, he felt a sharp pinch coming from the drivers side seat. Upon further inspection, the contacts husband noticed an abnormal hole with smoke coming from the drivers side seat. There was no visible fire present. No medical attention was sought. No warning light was illuminated. The local dealer was contacted; however, the vehicle was not diagnosed or repaired due to the cost. The manufacturer was not made aware of the failure. The failure mileage was approximately 190,000.