2011 adblue heater and processor failure
Junior Member
Joined: Oct 2016
Posts: 30
Likes: 1
From: Canada
GLE 350d Designo 2016, E350 2011 A207 Cabriolet
Junior Member
Joined: Apr 2009
Posts: 19
Likes: 1
From: Houston TX
2010 ML350 BlueTec, 1964 230SL
AdBlue tank repair kit
https://xemodex.com/us/product/def-s...mercedes-benz/
Junior Member
Joined: Apr 2009
Posts: 19
Likes: 1
From: Houston TX
2010 ML350 BlueTec, 1964 230SL
Yes. As far as I know, both the US and Euro BlueTec's have the same issues with the BlueTec tank
Super Member
Joined: Jun 2014
Posts: 507
Likes: 25
From: Massachusetts
2014 Smart ForTwo Passion Cabrio
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
Yes. As far as I know, both the US and Euro BlueTec's have the same issues with the BlueTec tank
I live in Berlin. I'm going to look into this and see what the nearby Berlin service center is doing about it.
Junior Member
Joined: Apr 2009
Posts: 19
Likes: 1
From: Houston TX
2010 ML350 BlueTec, 1964 230SL
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.
I live in Berlin. I'm going to look into this and see what the nearby Berlin service center is doing about it.
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.
Super Member
Joined: Jun 2014
Posts: 507
Likes: 25
From: Massachusetts
2014 Smart ForTwo Passion Cabrio
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.
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Super Member
Joined: Jun 2014
Posts: 507
Likes: 25
From: Massachusetts
2014 Smart ForTwo Passion Cabrio
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?
Super Member
Joined: Jun 2014
Posts: 507
Likes: 25
From: Massachusetts
2014 Smart ForTwo Passion Cabrio
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.
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.
Newbie
Joined: May 2018
Posts: 3
Likes: 0
2011 ML350
I just joined the club!!!!
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
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
Super Member
Joined: Jun 2014
Posts: 507
Likes: 25
From: Massachusetts
2014 Smart ForTwo Passion Cabrio
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
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
Super Member
Joined: Jun 2014
Posts: 507
Likes: 25
From: Massachusetts
2014 Smart ForTwo Passion Cabrio
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.
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.
Newbie
Joined: May 2018
Posts: 3
Likes: 0
2011 ML350
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.
Last edited by ridgebackdad; May 10, 2018 at 09:41 AM.
Junior Member
Joined: Oct 2014
Posts: 15
Likes: 0
2012 ML 350 BlueTec 4Matic
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!)
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!)
MBWorld Fanatic!
Joined: Oct 2011
Posts: 7,107
Likes: 765
From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
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!)
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!)
https://mbworld.org/forums/m-class-w166-149/
Junior Member
Joined: Oct 2014
Posts: 15
Likes: 0
2012 ML 350 BlueTec 4Matic
MBWorld Fanatic!
Joined: Oct 2011
Posts: 7,107
Likes: 765
From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
Junior Member
Joined: May 2018
Posts: 50
Likes: 6
Ml350
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!)
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!)
Senior Member
Joined: Nov 2013
Posts: 330
Likes: 17
From: Laguna Hills, CA
2013 ML 350 BlueTec
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.
Maybe is about time that a smart-*** lawyer will start a lawsuit against MB.
Newbie
Joined: Feb 2018
Posts: 3
Likes: 0
From: Woodbury, Minnesota
2011 ML350 Blutec
I'm having a little problem with the hook up of this eliminator. The wires are black, red, yellow, Orange , Green, Orange , Green. The directions are a little different.... the last 4 are Green, Orange, Green, Orange so dont match the directions. any help please, I dont want topower on and have it wrong.
Senior Member
Joined: Nov 2015
Posts: 272
Likes: 49
From: Ottawa, Ontario
2013 ML350 Bluetec, 1966 Ford Mustang Convertible (sold)
Got Codes P20B9 Reductant heater A control circuit open + P20E8 Reductant pressure too low
Removed the DEF tank and there was a leakage at the pump assembly (causing low pressure) and pressure line heater wire ended up with a short circuit because of corrosion. Replacing the pump assembly Bosch 0928404009 and cleaning the contact should take care of this particular issue.
Removed the DEF tank and there was a leakage at the pump assembly (causing low pressure) and pressure line heater wire ended up with a short circuit because of corrosion. Replacing the pump assembly Bosch 0928404009 and cleaning the contact should take care of this particular issue.
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...
