2014 GLK250 Continued Issues - BEWARE
Member
Joined: Feb 2014
Posts: 220
Likes: 7
2014 glk 250BT (RIP, 3/1/17}, 2010 C300
Since my last post I've had 2 more NOx sensor failures. The latest last week. Interestingly all four have been replaced but no sensor location has failed twice.
Luckily all the issues have been fixed at no charge since everything is covered under the warranty. The dealers retail replacement per sensor is $445.00
Luckily all the issues have been fixed at no charge since everything is covered under the warranty. The dealers retail replacement per sensor is $445.00
Last edited by LesF; Apr 7, 2016 at 10:29 AM.
Junior Member
Joined: Aug 2015
Posts: 24
Likes: 2
From: Cartersville, Georgia
Mercedes Benz GLK250
I have 2013 and had a similar problem when after I put about 4k miles on it. Got a dashboard warning the I had a certain number of starts left. After calling the dealer and them squeezing me in for an appointment, they first filled the ADblue tank and that did not fix the problem. Then they had to replace the sensor and update the software and it seemed to fix the problem. This all happened around November of 2014. Hope this helps you fight your battle with the dealer?
Junior Member
Joined: Aug 2015
Posts: 41
Likes: 3
2008 SL65 AMG & 2014 GLK250 Bluetec
I had been reviewing this thread for a few years but I wanted to share a post.
I bought the GLK250 used and the dealer repair history showed there was a repair for the NOx sensors. After reading this thread, I assumed the issue was fixed according to Mercedes Warranty repair. The odometer was around 10,000mi.
I next encountered an issue at 17,000 mi with a trip to the dealer to fix both NOx sensors and get me on the road.
Well, this morning I am back at my dealer with 35,000 miles and first the CEL came on with a P229F, and 20 miles later, the AdBlue Indicator came up in the cluster indicating low DEF. I added about 2+ Gallons of DEF to top it off and it still stayed on. With 6 starts left, I drove it to the dealer.
I don't think the technician knows the issue. Still under warranty!
I bought the GLK250 used and the dealer repair history showed there was a repair for the NOx sensors. After reading this thread, I assumed the issue was fixed according to Mercedes Warranty repair. The odometer was around 10,000mi.
I next encountered an issue at 17,000 mi with a trip to the dealer to fix both NOx sensors and get me on the road.
Well, this morning I am back at my dealer with 35,000 miles and first the CEL came on with a P229F, and 20 miles later, the AdBlue Indicator came up in the cluster indicating low DEF. I added about 2+ Gallons of DEF to top it off and it still stayed on. With 6 starts left, I drove it to the dealer.
I don't think the technician knows the issue. Still under warranty!
Senior Member
Joined: Feb 2013
Posts: 375
Likes: 18
From: Michigan
2014 GLK250BT, Polar White; 2016 GLE 300d, Polar White
I had been reviewing this thread for a few years but I wanted to share a post.
I bought the GLK250 used and the dealer repair history showed there was a repair for the NOx sensors. After reading this thread, I assumed the issue was fixed according to Mercedes Warranty repair. The odometer was around 10,000mi.
I next encountered an issue at 17,000 mi with a trip to the dealer to fix both NOx sensors and get me on the road.
Well, this morning I am back at my dealer with 35,000 miles and first the CEL came on with a P229F, and 20 miles later, the AdBlue Indicator came up in the cluster indicating low DEF. I added about 2+ Gallons of DEF to top it off and it still stayed on. With 6 starts left, I drove it to the dealer.
I don't think the technician knows the issue. Still under warranty!
I bought the GLK250 used and the dealer repair history showed there was a repair for the NOx sensors. After reading this thread, I assumed the issue was fixed according to Mercedes Warranty repair. The odometer was around 10,000mi.
I next encountered an issue at 17,000 mi with a trip to the dealer to fix both NOx sensors and get me on the road.
Well, this morning I am back at my dealer with 35,000 miles and first the CEL came on with a P229F, and 20 miles later, the AdBlue Indicator came up in the cluster indicating low DEF. I added about 2+ Gallons of DEF to top it off and it still stayed on. With 6 starts left, I drove it to the dealer.
I don't think the technician knows the issue. Still under warranty!
Maybe the indicator has to be reset.
MBWorld Fanatic!
Joined: Jul 2012
Posts: 1,369
Likes: 319
From: WI
GLK 250
3 year-old thread bump, eh?
Sorry to hear of your troubles. Unless you have a good relationship with your MB dealer, I'd suggest trying a different MB dealer. These are common faults in the Bluetec emissions system and there are updated parts available. From my reading here, the replacements have held up well.
You could also visit a trusted Indy shop that works on German cars (and has MB specific scan tool) to have these sensors replaced for a fraction of what the MB dealer charges.
Or you could find a software tuner in your area and have the ECU "optimized" into passive off-duty mode, no more problems.
Sorry to hear of your troubles. Unless you have a good relationship with your MB dealer, I'd suggest trying a different MB dealer. These are common faults in the Bluetec emissions system and there are updated parts available. From my reading here, the replacements have held up well.
You could also visit a trusted Indy shop that works on German cars (and has MB specific scan tool) to have these sensors replaced for a fraction of what the MB dealer charges.
Or you could find a software tuner in your area and have the ECU "optimized" into passive off-duty mode, no more problems.
Newbie
Joined: Oct 2007
Posts: 2
Likes: 0
'85 300d
3 year-old thread bump, eh?
Sorry to hear of your troubles. Unless you have a good relationship with your MB dealer, I'd suggest trying a different MB dealer. These are common faults in the Bluetec emissions system and there are updated parts available. From my reading here, the replacements have held up well.
You could also visit a trusted Indy shop that works on German cars (and has MB specific scan tool) to have these sensors replaced for a fraction of what the MB dealer charges.
Or you could find a software tuner in your area and have the ECU "optimized" into passive off-duty mode, no more problems.
Sorry to hear of your troubles. Unless you have a good relationship with your MB dealer, I'd suggest trying a different MB dealer. These are common faults in the Bluetec emissions system and there are updated parts available. From my reading here, the replacements have held up well.
You could also visit a trusted Indy shop that works on German cars (and has MB specific scan tool) to have these sensors replaced for a fraction of what the MB dealer charges.
Or you could find a software tuner in your area and have the ECU "optimized" into passive off-duty mode, no more problems.
Newbie
Joined: Dec 2021
Posts: 1
Likes: 0
2014 Glk 250
B1S2 nox sensor
Since my last post I've had 2 more NOx sensor failures. The latest last week. Interestingly all four have been replaced but no sensor location has failed twice.
Luckily all the issues have been fixed at no charge since everything is covered under the warranty. The dealers retail replacement per sensor is $445.00
Luckily all the issues have been fixed at no charge since everything is covered under the warranty. The dealers retail replacement per sensor is $445.00
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