The contact owns a 2013 Mercedes-Benz C250. The contact stated that while driving 10 MPH, the front passenger's side air bag unexpectedly deployed with no impact on the vehicle. The air bag warning light was illuminated. The contact parked and then restarted the vehicle before driving to the residence. The contact sustained bruises and scratches on his forearm, but medical attention was not received. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 100,000.