Reply to GA BenzTech's Post: when i start the engine white exhaust come from the exhaust pipe. the radiator light is on, months ago i notice something inside the radiator that looked like cold grease at the top. i was told it was nothing to worry about. the oil is the color of coffee and creme or peanut butter. I have always heard peanut butter means you have blown a gasket. true? the local mercedes dealer recommend doing the valves. at a price of $6000. HELP!