Mercedes-Benz 230CE Air Filter - Replacement Air Filters Use K&N's application search to find the right air filter for your Mercedes-Benz. Upgrade your Mercedes-Benz 230CE today with a K&N air filter. K&N automotive replacement air filters are a top performance accessory that can help your car or truck run better. Mercedes-Benz W124 Fuel Filter Replacement - Pelican Parts wwwcanparts›Mercedes-Benz HomeThe Mercedes W124 fuel filter is located on the underside of the car, behind the rear right side seat. You will need to safely lift and support your car. Please see our article on safely jacking up and supporting your Mercedes-Benz.