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[Andy B]

I assume the NOx sensor is at the red arrow  I recently replaced the clamp at the blue arrow & used a little exhaust paste. Any connection?

[Andy B]

..

[Doctor Gollum]

It's certainly something to consider 

[Marks DTM Calib]

Looks to be the post SCR NOx sensor (there are is likely two, one between the DPF and SCR, the other post the SCR) and guessing the clamp is downstream of that, so I would say you are ok

[Marks DTM Calib]

Scratch that, zoming in it appears to be the pre-SCR NOx, I can see what looks to be the post-SCR NOx close to the clamp

[Doctor Gollum]

The clamp is forward by the transfer case.

https://www.ebay.co.uk/itm/236782221032?_ul=GB&mkevt=1&mkcid=1&mkrid=710-53481-19255-0&campid=5338990947&toolid=10001&customid=eb%3Ag%3Avms%3Aeb%3Ap%3A236782221032%3B{GCLID}&adtype=pla&loc_interest_ms=&loc_physical_ms=9045815&gbraid=0AAAAADmMgijAZlhgyivvwQNHwaVDa2mdw&gclid=Cj0KCQjw_b_QBhCSARIsAP6hR4cQoTn1aQZztYmZIVh5PgU8LsnxIaLWkbN0SrQ1QWtzZ_6eSogIbj4aAv4NEALw_wcB

This should be the image of the back of the engine. The extra sensors missing on EU4 is between the EGR and turbo heat shield.

[TheBoy]

Chap next door has a '17 CLS 350 and he's been quite careful regarding where he buys and how he store adblue for his car. He topped it up recently and noticed as he was filling it that it didn't look right. He's added some anti crystal to it with fingers very much crossed.

He has noted that because it doesn't have a gauge it's almost impossible to guess the fluid level when the warning pops up and therefore how not to overfill it... So simply adds a couple of litres or three each time.

We keep our AdBlue in the utility room, and don't buy from petrol forecourts where its in the sun and frost, for that reason.

Hers is a crappy 9l tank, so when the warning pops up, we put in 5l

[Andy B]

This is the other side of the clamp ... there is a sensor there too ... no idea what it is 

[STEMO]

Wifey's grandland is going into Vx for a recall on Tuesday morning (timing chain check). Just had a call from them to confirm, and he asked me if it had anything modified on the software. He warned me they will be doing a software update and anything I had had done would be wiped. I asked him straight out if he meant Adblue delete and he confirmed it. Hers is fine but mine is going nowhere near Vauxhall 

[Doctor Gollum]

When they reflash the software do they also drain the system?

[STEMO]

When they reflash the software do they also drain the system?

They overwrite everything, apparently.

Ah, sorry, you mean drain the system of Adblue? I don't know, I've never had it done.

[Andy B]

Seems like the car I bought from Mercedes themselves had already been remapped. The indie it's at have not been able to talk to it in enough depth to do anything with it. Spoke to the dealer I bought it from who understandably couldn't do anything other than suggest to take it to a local dealer who will likely charge me ££££££££  Although it's never asked for Adblue, it's used it over the years. And apparently the exhaust has been welded some time in the dim & distant. 
There's a local place that quote £350 for an Adblue delete. The current indie says they will give me a full report of what they've done or tried to.

[YZ250]

………..
The indie it's at have not been able to talk to it in enough depth to do anything with it……..

This was the problem that I had. It could be the pump, it could be the inline heater, it could be something else. There was not enough direct information to point to the exact faulty part, hence why they were going to replace everything at great cost.

……..
There's a local place that quote £350 for an Adblue delete……..

That seems about the going rate to put a stop to any further messages and release a bit of extra torque at the same time. 

[STEMO]

Mine is someone else's problem now 

[Andy B]

I'm curious as to what MB would have done had I taken the car to them for its 'software update' .... would that have high lighted the current re-map?