ml280 problem

I have a 07 ML280 that goes into limp mode. Reader came back with M55 fault. i have seen that this us a common problem but despite replacing the valve, which failed to clear the fault and placing a resistor as suggested in a few feeds I have read, It still goes into limp mode. any other...

Hi, I own a ML280 cdi 2007 ( 18000miles) and the engine management came on about a week ago and went into limp mode. Took it to a garage I know really well and they plugged it in and got fault code. They confirmed with mercedes what was needed. Turns out it needed a switch of some sort for for...