Hello, I bought the MB 1.5 years ago as a camper. The owner said at that time he had the stand gas set up, because the engine of course in the cold start with little speed strongly vibrates. In short, the stand gas rotary switch device was built away. And on the whole gas rod the stand gas can not be turned down. The engine has in warm run approx. estimated heavy 3-4000 revolutions, always runs constant and reliable, but it is really very powerless. rmal…. 65ps with RV set up(alcoves). So it must be the ESP. Ask with please for help: Is it the membrane ??????? Workshop said change costs up to 1000€ due to ESP test stand setting, etc. !?!?? Now I just regulate at the traffic light with the switch off the speed down ???, goes also…. but so next week to Andalusia, only if it has to be…. Can the membrane repair not be cheaper? And is it broken? Stand gas adjustment screw is not available at the ESP? s you think, thank you for answers !