107123210

Maybe this has already been discussed?

Anyway, today I received a letter from MB Canada. It stated that Daimler have determined that a defect may exist in the emission control system on 2013-2015 cars and that our GLK250 is one of the models affected.

They say that the soot particulate sensor may fail and trigger diagnostic / Check Engine light which would prevent system from monitoring other potential problems.

As a result, they are extending warranty on the sensor to 10 year.s or 193k km. (I thought we had 8 years anyway, so not too generous!)

Seems to me, that if Daimler know there is a fault, it should be fixed, not wait for failure!

andreigbs

Kindly post a pic or PDF of the letter, masking personal info. I'd like to see a copy in case we don't get one here in the US.

formerjeepguy

Is this sensor the differential pressure sensor? or is it something else?

107123210

All I know, is what they said in letter:

107123210

Google search comes up wit this sensor:

https://www.ecstuning.com/b-genuine-...or/0009053304/

andreigbs

I believe that's the sensor for the 3.0L Bluetec, as when I plugged the part# into the MB parts site I use, it tells me it doesn't fit the GLK250.

Further searching turned this one up: NOx sensor for about $417. P/N 000-905-34-03

Thanks for posting the letter. Hopefully US owners aren't far behind to receive their notices.

Bill0004

Would this relate to a P229F check engine code by chance? Mine threw a CEL on Friday with this code, I cleared it to see if it would come back right away and 400 miles later it's not back. Unsure what I should do.

purebass

I got the same letter as well. Have a 2014 GLK 250.

107123210

I read on-line that is most likely a NOx sensor code.

andreigbs

Sensors can go bad for no good reason. Other times the signal they transmit can be intermittent, again for no good reason. In both cases, you will get a CEL.

If the CEL cleared and stayed off, I'd just keep an eye out for it. The emissions control system on these Bluetecs is overly sensitive and extremely complex.

Extended warranty on something, ANYTHING in the system would be welcome.

gilleslapointe

I

gilleslapointe

i received the same letter from MB. The check engine light came on 3 weeks ago. The code that I received using my tester is P24AF : Particulate matter sensor circuit/range/performance.
I called MB Canada and they said that they cannot give me the associated code for the soot particulate sensor.I have to go to the dealer and if it is the sensor, I would not have to pay.If it is not the sensor, I will have to pay for the check engine analysis $$$$$.

107123210

Today, I spent some time looking at the MB EPC, and it seems the soot sensor is not the pressure sensor on the DPF. - It is located further back in system and must determine the soot content of the exhaust somehow? I could be wrong. Just got my WIS/EPC going again and then it broke - again Did find the wiring diagram for the DEF tank and it's level sensors. Looked like there is a common electrode plus three level probes. Must measure current or voltage between probes and common via the DEF which is conductive.

bluecoupe05

I have a MY2013 GLK 250 BT that threw a CEL this afternoon. I was able to read and clear the P24AF code with my icarsoft MBII diagnostic scanner. This was the only code reported and the CEL is now off. @gilleslapointe, have you been to the dealer for a diagnosis and if so, what was the resolution? Many thanks

bluecoupe05

Has anyone else had a P24AF trouble code? Thanks for your reply.

Shrapnel

I have had the CEL on with P24AF for a few weeks now, scouring the forums for a solution. Then I found this. Has anyone had it to the dealer to determine warranty yet? I also got a P20BE "Reductant Heater "B" Control Circuit Performance" fault more recently. They are likely related.

bluecoupe05

I’m currently at the dealer waiting for the soot sensor to be replaced under the extended warranty program MB Canada announced last September. Hopefully this will resolve the MIL and P24AF trouble code.

Shrapnel

I forgot to report back. I had the same done, and no problems for a few months now. Covered under warranty, no charge.

As for the reductant heater, I ordered an aftermarket heating element and installed it myself. It was quite the involved process including soldering of wires, but it fixed it.

andreigbs

Could you elaborate a bit more? Are you talking about the AdBlue heater thingy or something else? Thanks in advance.

Shrapnel

The inner tank heater for DEF, yes. I got it from Xemodex online. I just looked and they don't sell the element only anymore. It's a kit, but I assume it's the same heater I got. I paid $349 CAD plus tax and shipping.

andreigbs

Thanks, I was keeping an eye on that myself. There is a repair kit from MB, it used to be around $800, now it's over $1k. It comes with all the parts you need, no soldering involved.

Hopefully the fact that we garage ours (even though WI gets sub-zero every winter) will keep it alive.

Jckissin

So my GL 350 had two NOx sensors replaced in March of last year by the previous owner. Now my dealer says I have a NOx sensor bad. Generally my dealer has been replacing parts under warranty that need replaced if they fail within two years per Mercedes guidelines. The previous owner had bought the SUV as a Certified Pre-Owned (CPO) vehicle. The dealer tells me they can’t be replaced under warranty as the CPO replacement does not warrant the parts for two years. I am going to suggest that the previous ones replaced should have been replaced by the emissions warranty, not the CPO. The SUV was originally sold in Pennsylvania so it should have fallen under the 7/70 emissions regulation for that state. I think the Pennsylvania regulation will apply even though the car is in Florida now. One potential issue however is the SUV has been in service 7 1/2 years but only has 60K miles on it. Any thoughts or advice would be appreciated, as I am really frustrated. Thanks!

andreigbs

Dumb question: is your GL 350 a gasser or diesel? This thread is about Bluetec diesels and the emissions system specific to them, not gassers.

Also, the GL is not a X204 chassis. Try the X164 subcategory instead.

Jckissin

Thanks for the update, when I searched for NOx sensors, this thread came up and as I read it it talked about a lot about NOx sensors on diesels. Thought I was in the right place.

fmorelli

Our 2013 GLK 250 threw this code over the Summer with ~62k miles. Just took it to the dealer. Dealer says soot sensor, wanted $900. Let's see $380 list price, available from MB for $270 shipped, or from Bosch directly if you know how to get it. Then ... in the exhaust, unscrew, electronics held with two bolts and one electric connector. Baffling how that adds up to $900.

But ... seems like no warranty coverage in the USA. Diesels are weird too, insofar as what is covered under Federal Emissions law. Wasn't worth leaning on MBUSA ... easier to spend $270 and slide under the GLK.