Check Engine Light On problems of the 2019 Mercedes Benz C300

The contact leased a 2019 mercedes-benz C300. The contact stated that while driving at 70 mph, the vehicle decelerated independently to 30 mph with the check engine warning light illuminated. The failure was experienced three times. The vehicle was towed to three unknown dealers where the vehicle was diagnosed and the contact was informed that the high-pressure fuel pump needed to be replaced. The ecm was also replaced however, the repair failed to fix the failure. The vehicle was not repaired. The failure mileage was 6,000.