S350 Limp Mode

[davsop]

Had my Nox sensor replaced a few weeks ago. Not cheap
Just over a week later the car started going into limp mode whenever I turned the engine off and then restarted it. Yesterday to clear the limp mode on a journey into town I had to turn the engine off and restart several times to clear it.
(Have previously had a split turbo pipe a few years ago so I shouldn't think thats gone again)
Any ideas?
Thanks

 

[Larkone]

The best idea is to get the codes and live data read so you know why it is going into limp mode - anything else is just a guess

 

[mioba]

Is this a diesel OM642, Actuators are certainly not uncommon on these to fail and they wont throw up any codes - done one last year and my W251
As mentioned codes first.
Cheers

 

[davsop]

Thanks all. Merc technician came out but no fault codes showing up. Just got to carry on for now and see what develops.