Nox sensors gone for the third time in 2 years

Richard79

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Joined
Jul 7, 2020
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Your Mercedes
C220d Sport Premium Plus Estate (2017)
I've a 2017 c220d estate, and had the dreaded engine management light come on in march 2021. Not realising the common issue with these I got my local indy to sort this for me, which set me back £600.

Last March the engine management light came on again (this time accompanied with the adblue mileage countdown). After speaking to my indy, he told me to go straight to Mercedes and get them to replace as they had used genuine parts. In fairness the mercedes dealership in Bedford sorted this all out with no charge.

Then last month yet again I got the engine management light come on again. 0af368de-1.jpg After speaking to Mercedes they said they'd take it back in to look, but wanted a £175 diagnostic fee. I've now managed to get a error code read done myself which is coming up with the attached error codes. Can anyone confirm if this is the sensors gone again (downstream was replaced previously)?
 

ajlsl600

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Joined
Nov 18, 2013
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Location
france
Your Mercedes
clk3202001,sl6002003 with everything regrettably sold ,A class 170cdi auto. NG/TF1800 ML250
Some much hassle with this unreliable kit, adblue and nox stuff. I wonder what message comes up when they are dissconected /reconnected?
 


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