Since yesterday I finally have a SLK! It is my dream car, 170 model, 230 compressor , year 99, 280,000 km, black, deep, hard !!! inside black/red. However a problem: from 120 km/h the warning lamp lights up for the cooler ! When I drive then again under 120, it goes out again. Besides: from 180 he starts to jerk something……. Does anyone have an idea what that can be ? I am grateful for all the clues.