2014 GLK 250 bluetec AdBlue warning
Is it only B5 what you can find over here? I live in LA area.
This is interesting topic on the other side also, because I come from Europe and I am planning to take this car with me back to Europe. Should I encounter these same problems there, if quality is different.
During the last visit, MB had the dealer replace the downstream NOx sensor (post converter), perform the reset procedure (again), and did a NOx sensor adaptive reset (for calibrating the replacement part I assume). Dealer also road tested my GLK multiple times including an overnight cold start and rechecked for faults - none!
Hoping this fixes the issue with my GLK for the long run. There is a note that MB is still working on a software fix. Keeping my fingers crossed!
My 2c on this issue is that there was likely a part change for 2014; probably the NOx sensor (the replacement part the dealer put in lists at US$706.25). The AdBlue control module could not be properly calibrated for the new for 2014 sensor (slightly different or shifted operating parameters), hence, the AdBlue low consumption fault code/start remaining count down. It didn't matter how many times the system was reset, the fault code would always come back. How far out the sensor's operating parameters were probably related to how long one could drive before the CEL/remaining starts count down. I am pretty sure the sensor readings are averaged over time/distance traveled. Once the accumulated reading is seen as out of spec...fault code.
For those questioning the quality of the fuel, it probably is a contributing factor, but is likely not a major one but just enough to tip it over the edge.
One last note...my dealer has been great! Always quick to respond and kept me up to date with what was going on.
Last edited by TTRSh; Oct 29, 2013 at 12:38 PM.
The Best of Mercedes & AMG
I can not sell the car in Europe for certain period of time (years). I need to get CoC (Certificate of Conformity) paper from Europe to comply with European regulations, mainly for emissions (CO2/km). This is easy to get, as this is built in Europe.
So there is a bit work to be done, but when you know it, it is pretty straight forward.
I will keep this thread updated if anything new pops up.
AdBlue warning light came on with Starts Remaining: 4. I brought it in to the dealer and they said there was some computer problem which has been fixed but kept it overnight to test it out more. Anyone else experienced this problem?
BTW, the "Starts Remaining" keeps going down after each start until 0. This is my first bluetec - didn't realize there would be these additional hassles.
-William
I would say the ride in the 250 is a little better but the 250 is much quieter. Wife and I both noticed a lot of wind and road noise in the 350. The 2013 GLK 350 we were using only had a few thousand miles on it.
Tomkelsey
Like you all the trips to and from the dealer and all the test driving was on our fuel.
EDIT: Service Tech reported they have a bunch of software updates to flash to the car. Hopefully will have it done by the end of the day...
Last edited by emtskibum; Nov 1, 2013 at 01:20 PM.
It s interesting to read your problems with the GLK cause I drive a S 350 Bluetec and have the same problems!
I bought it second hand with 20000 km ( about 1200miles) drive it to bulgaria and in slovenia I saw on the dashboard that I can only drive 500 miles because I had problems with my AdBlue. I was surprised because before I set up my dealer maintened the car.
It was very late and call the Mercedes Emergency Call Center they gave me a dealer in Zagreb.
When I wanted to the drive there I was in a petrol station, filled it up (with diesel) and started and the message with the yellow warning light disappeard.
I thought it would be just a small thing and doesn't bothered.
that was 2 weeks ago and now....
Twice it said I need to fill up
An other time the pressure is too low....etc...
Before I go to the dealer I checked the www and saw this and you all helped me a lot!
So...
THANK YOU VERY MUCH
Hope I can send an picture of a repaired Merc S350 BL
EDIT: Service Tech reported they have a bunch of software updates to flash to the car. Hopefully will have it done by the end of the day...
Instead, and in hind sight perfectly normal, they asked if I needed a cab ride home and what time I'd like to pick it up.
Oops.
After explaining I was with dogs and that I'd then have to make a different date appointment the service guy immediately suggested that I give him a few minutes to pull the GLK into the shop and at least check the codes.
Fifteen minutes later after a lap around the block with the dogs the GLK was still in the shop and the service guy and several mechanics were studying the screen of the PC connected to the vehicle. THen they walked around to the front and opened the hood.
I called over (customers not normally allowed in the shop) and asked if it was serious.
He replied that I should come over and have a look.
Sensor cable nicely chewed almost completely through by a rodent or some sort of woodland creature.
They grabbed their crimp tools, told me to wander around for a while and they'd have it fixed right away.
Once again, I came back and the GLK was still in the shop. Hmmm. What now? This time the delay was due to the wait for getting it washed and the interior vacuumed out.
More walking around. Doggies were tired by now. So was I.
Came back. GLK was dripping wet and clean.
I asked the service guy for the invoice since this was clearly not a warranty issue.
No charge.
On these types of forums people always report and ***** about a problem and then we never get a final report on whether the problem was solved or if there were any issues.
So my report is that the problem is solved. That the Victoria, BC Benz dealer was simply awesome both in support, service and just giving me a general sense of well being.
And the check engine light is off!
lol During the last visit, MB had the dealer replace the downstream NOx sensor (post converter), perform the reset procedure (again), and did a NOx sensor adaptive reset (for calibrating the replacement part I assume). Dealer also road tested my GLK multiple times including an overnight cold start and rechecked for faults - none!
Hoping this fixes the issue with my GLK for the long run. There is a note that MB is still working on a software fix. Keeping my fingers crossed!
My 2c on this issue is that there was likely a part change for 2014; probably the NOx sensor (the replacement part the dealer put in lists at US$706.25). The AdBlue control module could not be properly calibrated for the new for 2014 sensor (slightly different or shifted operating parameters), hence, the AdBlue low consumption fault code/start remaining count down. It didn't matter how many times the system was reset, the fault code would always come back. How far out the sensor's operating parameters were probably related to how long one could drive before the CEL/remaining starts count down. I am pretty sure the sensor readings are averaged over time/distance traveled. Once the accumulated reading is seen as out of spec...fault code.
For those questioning the quality of the fuel, it probably is a contributing factor, but is likely not a major one but just enough to tip it over the edge.
One last note...my dealer has been great! Always quick to respond and kept me up to date with what was going on.
It s interesting to read your problems with the GLK cause I drive a S 350 Bluetec and have the same problems!
I bought it second hand with 20000 km ( about 1200miles) drive it to bulgaria and in slovenia I saw on the dashboard that I can only drive 500 miles because I had problems with my AdBlue. I was surprised because before I set up my dealer maintened the car.
It was very late and call the Mercedes Emergency Call Center they gave me a dealer in Zagreb.
When I wanted to the drive there I was in a petrol station, filled it up (with diesel) and started and the message with the yellow warning light disappeard.
I thought it would be just a small thing and doesn't bothered.
that was 2 weeks ago and now....
Twice it said I need to fill up
An other time the pressure is too low....etc...
Before I go to the dealer I checked the www and saw this and you all helped me a lot!
So...
THANK YOU VERY MUCH
Hope I can send an picture of a repaired Merc S350 BL
In W212 Forums , I have not heard of diesel powered engines are throwing away some problems either

Read konigstieger's posts as well as stickies at the top of the page ,I am sure they will give you some insight
To tomkelsey :
Thanks for your uploading an image of your gauge cluster as I wondered what it looked like .Honestly , I was not aware of such warning before
HAPPY DRIVING ALL
Last edited by BenzV12; Nov 2, 2013 at 07:19 AM.
At least now, all MB dealers will have this software, so if it happens while on road, we should be able to go to any dealer for update.
Hope this is the end of the problem.







