One problem related to headlights has been reported for the 2009 Mercedes Benz C350. The most recently reported issues are listed below.
The contact owns a 2009 Mercedes Benz C350. The contact stated that the vehicle's headlights remained illuminated causing the battery to fail. The failure recurred several times. The vehicle was taken to a dealer. The technician diagnosed that there was a loose wire that needed to be adjusted. The vehicle was repaired. The failure recurred. The manufacturer was not made aware of the failure. The failure mileage was 30,700.