W220 s320cdi limp mode switch on off
 

Hello my s320cdi starts fine drives fine for a few minutes then goes into limp mode won't rev over 3k revs unless while driving I switch ignition off then on and it drives fine antil I have to stop in traffic then it goes back in limp mode, antil I repeat the on off procedure! Any advice would be most appreciated

Hello - are you able to pull any codes?

No codes but was told turbo boost sensor if that means anything to you? Thanks for reply by the way

That makes sense since you have a diesel engine; that sensor is essentially there to protect the turbo. When you had the diagnostic done, did they say anything about the waste-gate hose failing?

No but I have a leaking pipe which lead to valve type thing near balk head same as one new turbo egr related repaired that but still the same. If i start engine and move straight off its fine but when the revs get to low it goes into limp. I appreciate your help