Photo courtesy of Mercedes-Benz.

Photo courtesy of Mercedes-Benz.

Mercedes-Benz USA is recalling 814 2015 model-year E250 BlueTec, E250 BlueTec 4Matic, GLK250 and ML250 BlueTec vehicles to address potential oil leaks that pose a fire risk, the National Highway Traffic Safety Administration said.

This recall, already under way, represents an expansion of a previous recall.

In these vehicles, oil may leak in the chain tensioner area. If the oil drips onto a hot engine surface, the risk of fire increases, NHTSA said. Additionally, the leaking oil may create a road hazard for other vehicles on the road.

Mercedes dealers will replace the chain tensioner gasket, free of charge. Vehicle owners can reach Mercedes customer service at (800) 367-6372. The automaker’s number for this recall is 2015050005.