austingtir

2014 W212 E350

Im at the point where im so over replacing nox sensors on this POS that im seriously thinking if its possible to delete them altogether? Seems like I have replaced one every year or two like clockwork for the last 5 years.


I havent had another look underneath but would think if these cars have 02 sensors and nox sensors it might be possible? If it only has nox sensors then probably not??


Anybody know? If I can find a tuner to remove them in the programming/code them out I will.

S-Prihadi

I thought car with Nox sensors are only if your car can do the stratified burn ? Your engine can do this version of GDI parameters ?

O2 sensor still exist and the Nox sensors are extra sensors.
Nox sensors are after CAT
See page 5, item 700 & 710. Item 670 are the 02 sensors or Lamda.
https://catalogs.ssg.asia/mercedes/?...YWdlNzA9PTQ%3D

austingtir

Sounds about right.

Its items 700 and 710 in the diagram above. I also saw what almost certainly looks to be temp sensors back there too as shown in the diagram too.


I have vediamo and monaco DTS so I might also look at that route to delete them. But talking with a tuner in spain atm he thinks he might be able to do it.



So do you reckon these arent a purely emissions item and they do actually help fuel economy? Im assuming by statisfied burn you mean its allowing the engine to run at 19 or 20:1 AFR ratios at idle and cruise? so super lean burn for fuel economy??


I mean saving fuel is great and all that but it comes to nothing when you are spending anywhere from 400 to 1400NZD to replace these POS sensors everytime.

austingtir

So apparently PCMflash with either module 69 or 71 is the cheapest way to get into the ecu's on these.....


I'll be surprised if this is running me9.7 on DI. Must be 71?

S-Prihadi

Well, I honestly never have stratified burn engine , so I cant comment.
Economy is not important for me, I am lead footed

One thing for sure, the more sensors trying to make our engine "clean", the more hardware failures in the end.