serpentine belt diagramRelated Questions1989 mercedesthe odometer and heater dont work, why?1990 mercedes 500slwhen at idle a\/c blows cold air ,when driving no cold air.mercedes C280 4maticI am looking to purchase a 2007 Mercedes C280 4matic with 100k. What signs of problems can I look for? What? If any problems are inherent in this vehicle? Its from a used car lot and only comes with 30day warranty..