The contact owns a 2009 Mercedes-Benz ML350. The contact stated that while driving at 45 MPH in heavy rain, she observed smoke emanating from the rear of the vehicle. The contact stated that there may have been unknown warning lights illuminated. The vehicle was steered to the side of the road and turned off. The contact stated that when the vehicle was restarted, multiple unknown warning lights illuminated. The contact also stated that the key pad stopped working, and multiple electrical components stopped working, and that she experienced sinus issues thereafter. The vehicle was taken to a dealer where it was diagnosed that the SAM module got wet and there was an electrical fire because the wires were not covered and the SAM module needed to be replaced. The vehicle was not repaired. The vehicle was then taken to an independent mechanic, where it was not diagnosed, but the SAM module was replaced. The failure persisted. The vehicle was then towed to another independent mechanic, where it has yet to be diagnosed. The manufacturer was notified of the failure. The failure mileage was 140,000.