Have Mercedes Questions? Ask a Mechanic for Answers ASAP
Hi Karl, my name is***** sounds like you received a defective K40 relay. Did you install a new or a used relay? I'd return the relay and exchange it for another. The fan coming on when you turn the key on is a telltale sign of a bad K40 relay. I'd also check all of the connectors that plug into the relay and make sure they are clean and tight.
Let me know if you have any questions.
Hi Karl, I'm just following up with you on the Mercedes. Did you ever get this repaired?
Hi Karl, glad you got it going with the correct K40 relay. Try turning the key to the on position without starting the car and leave it on for about 3 minutes then start the car and see if the throttle responds.
Let me know if it works. Please don't forget to click on a rating for my service as this is the only way I receive credit from the website for helping you.
Hi Karl, just checking in. Did you try the reset procedure for the throttle actuator that I sent you?