u/Yankeebarbarian

Hi guys,

My 2019 C220d has popped 3 faults simultaneously, I initially tried adding the special solution to the adblue system to breakdown any crystals that might have formed but that didn't help, the fault disappeared for about 2 months, later on it came back so I actually replaced the NOX sensor for a brand new one (on the right side, closer to the front), I cleared the codes and it seemed all good and now roughly 250km later it came back on.

I'm really worried of a wiring harness issue as these are awful to work on but I was wondering if anyone has had that issue happen to them and how did they solve it?