jimo

Yes ! I just send my vin number to double check firmware ..
Jim

DBStephenson

Where can I get this solution? Or is their an ECU upgrade or 'reflash' kit available? Thx!!!

Lood01

This is more expensive but I think a more elegant way to fix the AdBlue tank.
https://xemodex.com/us/product/def-s...mercedes-benz/

flybd5

Do the German (or European) diesel models have this same problem? And does MB in Europe also refuse to do anything about it under warranty?

Lood01

Let's just be clear Mercedes will repair your vehicle when t is still under warranty. The issue is the EPA has a requirement that they warranty essential parts of the emissions system for 80K miles. The defin9ition os essential is no9t very good so they get away with "It is not covered under the 80K emissions warranty."

Yes. As far as I know, both the US and Euro BlueTec's have the same issues with the BlueTec tank

flybd5

No, let's not be clear. These statements are diametrically opposed. "Mercedes will repair your vehicle when it is still under warranty" <> "It is not covered under the 80k emissions warranty (which has nothing to do with the vehicle warranty from MB)". Excuses are like the exit ports on all mammals, everyone has one and they all stink. MB can't choose the cheaper way out and ignore what their own vehicle warranty states.

I live in Berlin. I'm going to look into this and see what the nearby Berlin service center is doing about it.

Lood01

Sorry, I should have done a better job of explaining. The 80K warranty on essential emissions components is a US EPA imposed Warranty. Don't know if the same Warranty is imposed in Europe.
The US EPA let the manufacturer decide what is essential so the manufacturer includes in their warranty what they designate as essential emissions parts and list them in the warranty. In the US the AdBlue tank is excluded from the Mercedes warranty.

So they do honor their warranty. It is what they include as part of the EPA imposed 80K warranty that is at issue.

flybd5

No, they don't. What MB is doing is taking the position that if the EPA mandates it, that's ALL they have to do, the minimum. Unfortunately for MB, customers expect them to honor their warranty, not the EPA's minimums. That's just pathetic. As I said, I'm going to check what happens in Germany and how much the repair parts cost here, because I have a strong feeling the US customers are getting scammed on the cost of the components required to "repair" these issues.

flybd5

Can someone please provide me with typical part numbers for parts required to repair a failed AdBlue system? The most common failure? And the cost of those parts in the US and Canada?

flybd5

Some of the German forums talk about a software update for the Adblue controller fixing the problem causing the error code. Something about "there was a problem with evaluating the sensor signals as the broth sloshed in the tank." Has anyone tried this, and what were the results?

It also appears that in Germany MB is fixing these at no charge and even providing loaner cars. Several messages also talk about problems going away by replacing NOX sensors.

ridgebackdad

So, had the adblue and check engine light come on repeatedly (and then go off - sometimes for days) on my wife's 2011 ML350 with 93K miles on it. Since it's my wife's daily driver, I had to take it in. They diagnosed it as the AdBlue sensor had failed. Extended warranty had expired two weeks prior (not that they were going to cover it anyway).

Since it's my wife's car, she wanted it fixed ASAP. So, $1550 later, she's driving away in that thing. It gets traded in later this month. The car. Not my wife.

This is the largest, most well cared for lemon I've ever owned.

-Ridgeback Dad

flybd5

Does the invoice you received have the part numbers of what was replaced?

ridgebackdad

It does!

The part # is: 164-471-11-75 They charged me $895.50 for the part.

flybd5

So they sold you the Bosch "Diesel Emissions Fluid Pre-Heater Repair Kit." Can't be the Mercedes kit, which is about $400 more, but my guess the Mercedes kit is the Bosch kit with the standard rip-u-off markup. The strange thing is that I cannot find that part number on Mercedes parts web sites here in Germany. I'll go ask at the big Mercedes company shop here in Berlin on Saturday (tomorrow's a holiday, something about some dude in Israel rising to the sky) and Friday I have to work all day.

You wouldn't have happened to tell them to give you the parts they replaced, would you? There is a theory running around here in Germany that the problem is that if the reservoir ever gets near to empty, the adblue fluid will crystallize and ruin the heater.

ridgebackdad

I didn't ask for the part, since my wife is the one who picked up the vehicle.

We had done a Service B on the car about 60 days earlier and they always top off the adblue - I did, however, talk with the service advisor who told me that they had to drain about 4 gallons out of the adblue tank to do the work - so that makes me think that the tank was nearly full when we brought it in. According to the service report, they added 5 gallons to complete the service.

EDIT: Misread the service report - corrected the # of gallons.

flybd5

Alright, so low level sounds like it wasn't an issue. I'll go looking to see what I can find.

fivesense

I've read through this and other threads on the topic and my mind is swimming a bit.

Our 2012 ML 350 with 69.5K miles on it experienced what feels like limp home mode. Non-Mercedes repair shop diagnostic says Code U42 requiring part number 166 471 07 75 (RS preheater repair kit). Cost- $1900. I'll take this to my local (Boise, ID) Mercedes dealer for a diagnostic.

What's the outcome of this issue thus far? The most recent post in this thread was May 2018, and now it's August 2018. Is the EPA mandate being honored?

Thank you in advance for your responses.

(as my ML 350 has performed well since I purchased in 2014, I haven't had much occasion to post here- still a rookie!)

Maj. Dundee

You are on the wrong forum.

https://mbworld.org/forums/m-class-w166-149/

fivesense

Is the issue with the AdBlue heater different from 2011 to 2012?

Maj. Dundee

I have no idea, but the fact still remains that you should post your problem on the appropriate forum.

Anthony Porta

A friend used the delete system to great effect. About $600 and he never worried about the whole system again.

jmhinkle

Just got the heater error on my 2012 GL350 and ran across this thread. 52k miles on the truck when it failed. I ordered the parts from Xemodex and will use those for the repair.

MBenz777

Apparently a very common problem for MB Bluetec after 50,000 miles when warranty expires.

Maybe is about time that a smart-*** lawyer will start a lawsuit against MB.

steve1600cc

Did you get this working and while I will still scroll down can you send me the site of where to purchase?

Potrice

Hello,

Has this fixed the issue? I have the code P20B9 as well but my 2013 ML350 Bluetec runs fine (just have the check engine light on). I initially thought it was the heater that crapped out but I think this is a wiring issue (because supposedly when the heater craps out, you can only start the engine a certain number of times). I then proceeded to drop the def tank. While doing it, I accidentally broke the long/slim black nozzle on the def fluid pump (pissed me off!). Do I need to change the entire pump now? Gluing the nozzle piece back on doesn't seem quite possible...