ESP Unavailable & Limp mode... PLEASE HELP

[MrG81]

Hi,

I cant seem to get to the bottom of an issue ive been having with my C220 CDI. When im driving if i put my foot down on the gas the ESP warning light comes on saying 'ESP Unavailable' and the car goes into limp mode. I have to reset the car by turning the ignition off and on about 4 times for it to clear. Once i have done this, it seems to run fine until it feels like doing it again. This seems to happen maybe 1 out of 10 times i use the car and it seems to happen mostly when im on the motorway/freeway.

1 Garage said that it could be the injectors. Another garage said i need to change the fuel rail. Both have put it onto a computer. But i dont see the link between the fuel rail/injectors and he ESP system.

Any ideas would help or if you have had the same problem and got it fixed would love to know what was up

 

[Herishi]

Have you tried / checked the battery(or batteries) low voltage causes the esp unavailable and hold function disabled messages and a low voltage would poss cause a limp mode too

 

[Diesel Benz]

Which diagnosis tool did these workshops have? There would have to be a stored code, one or more.

It could even be the accelerator pedal but quite useless to guess when proper diagnosis would reveal the real issue.

 

[MrG81]

thank you both for the advise.

@Herishi... no not checked the battery, will have a look and see if its ok

@Diesel Benz... Im not 100% sure. Im guessing it was a star, but i could be wrong. speaking with them tomorrow so will check that also.