What does "Elec. Stabil. Prog." mean. my engine also starts revving up and down. No one seems to know what this is ? the car is a C180 Kompressor 03. Any one any idea????

 

It's the ESP system in the car. In the event of a situation where the car is accelerating and spinning out of control the Electronic Stability Program will kick in and apply brakes to any or all of the wheels to 'stabilize' the car and return it to a proper driving stance.
ESP uses the ABS system to do its thing. In extreme cases it will retard the engine rpms to slow the car down and regain 'stability'. You can still drive the car unless ESP is active then it may cause erratic braking and possibly your engine rpm problem. I suggest you get it fixed.

 

make sure you have the correct tire sizes installed..the system could think that tires are slipping if they are not the correct size from one side to the next. also could be a bad wheel speed sensor. try turning off the ESP switch and see if the problem persists.