I have a 1995 600SL with an ASR problem. The ASR light came on the second I reved the engine using the throttle cable. Long storey why I did that but never the less the car was perfectly ok before that. I have now been told by Mercedes that I need a new electronic throttle pedal control unit (£2,500). I can't believe this by just doing what I did. The car only manages 40mph when the light is on. There is no pattern to it becasue some days the car works ok, no light on. It doesn't make any different if the car is hot or cold. I must have just upset something and hopfully it is just an adjustment somewhere.

Mercedes have had the car on their diagnostics and it says there is no reception from EFP N4/1 what ever that is. I have been told it may be the Potentiometer. Can someone tell me what this looks like and where it is. Also I have been told it is the electronic Throttle Actuator. Again can someone tell me what this looks like ans where it is. I will be amazed if I have damaged one of these just by reving the car by it's cable, especially as it is an intermitent fault. The problem is I cannot use the car because I don't know when it is going to come on.

Is there someone out there who has had a similar problem and have cured it.

Thank you in anticipation.

Alan.