Mercedes-Benz AG (?MBAG?), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (?MY?) 2012-2015 Mercedes-Benz Model 204 and 172 vehicles (C250 and SLK250), the warranty on the camshaft adjuster will be extended from the original 4 years/50,000 miles to 10 years/120,000 miles (whichever occurs first) from the original warranty start date.