Please help me CLK320
The engine rotation is up to 1500 at idle ( P / N ) and it is up to 800 at D-gear (normally it should be around 500 only).
Then when I drive out on highway, I feel that the car won't slow down as before ( decelerates very slowly )even I stop pushing on the fuel-pedal.
When the engine rotation is down to 1000, the car will automatically accelerate and the engine rotation will be up to 1500, then the car stop accelerate...
what is happening... I was very frustrated and helpless...


