2015 GLK250 - Not downshifting, cant use paddle shifters
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Newbie
Joined: Jun 2022
Posts: 4
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2015 MB GLK 250
2015 GLK250 - Not downshifting, cant use paddle shifters
I am having some issues with my 2015 GLK250 transmission.
Roughly 60,000miles (100,000km)
I cannot put it into manual mode and cannot use the paddle shifters.
Pushing the paddle shifters does nothing.
It also does not downshift until the very last possible moment at around 900rpm.
If I give it gas to pass someone on the highway or go uphill, it still does not downshift.
I can push the accelerator all the way down and it still won't downshift.
No error codes, and MB dealership just updated the ECU and transmission control module (as part of field measure device install).
The transmission control module was updated without issues.
Has anyone experienced this before?
Roughly 60,000miles (100,000km)
I cannot put it into manual mode and cannot use the paddle shifters.
Pushing the paddle shifters does nothing.
It also does not downshift until the very last possible moment at around 900rpm.
If I give it gas to pass someone on the highway or go uphill, it still does not downshift.
I can push the accelerator all the way down and it still won't downshift.
No error codes, and MB dealership just updated the ECU and transmission control module (as part of field measure device install).
The transmission control module was updated without issues.
Has anyone experienced this before?
Thread Starter
Newbie
Joined: Jun 2022
Posts: 4
Likes: 0
2015 MB GLK 250
Will this extended warranty still apply even though they are aware the transmission issue was prior to the warranty being initiated?
Thanks.
MBWorld Fanatic!
Joined: Jul 2012
Posts: 1,369
Likes: 319
From: WI
GLK 250
Whether they're aware or not is immaterial; the facts are (1) they "updated" the TCM, (2) they performed the AEM which includes ECU software updates.
The AEM warranty alone would cover powertrain-related issues. On top of that, whatever TCM update they did clearly didn't fix the transmission issue.
Codes or no codes, they're on the hook to figure it out now and fix it, and MB corporate will be paying them.
The AEM warranty alone would cover powertrain-related issues. On top of that, whatever TCM update they did clearly didn't fix the transmission issue.
Codes or no codes, they're on the hook to figure it out now and fix it, and MB corporate will be paying them.
Member
Joined: Mar 2003
Posts: 188
Likes: 78
From: Toronto, Canada
GLC300 (mine) GLK250 (wife's)
This is an extract from the Bluetec Settlement document detailing the items covered by the post-field measure extended warranty. There's a good chance that your issues are related to either the TCU or the HCU. Most service advisors have no clue what is or isn't covered so you will probably need to escalate to the service manager and mention the terms of the Settlement. In my case (PM sensor on wife's car) even the Service Manager was clueless but eventually caved. Just stick to your guns. Good luck.
Covered Parts. The Extended Modification Warranty shall cover the cost of all parts and labour needed to repair the items listed below:
Catalysts o Diesel Oxidation Catalyst o Diesel Particulate Filter Assembly o Selective Catalytic Reduction (SCR) Catalyst Diesel Exhaust Fluid (DEF) System o DEF Injector o DEF Injector Controller o DEF Supply Module o DEF Pump o Temperature Sensor Unit Parts of the Fuel System o Fuel Injectors Parts of the Exhaust Gas Recirculation (EGR) System o EGR Cooler (including bypass control) o EGR Valve o EGR Temperature Sensor o EGR duct Other Sensors That Are Covered o sensor where equipped after Field Measure) o NOx Sensors o Intake Manifold Pressure Sensor o Particulate Matter Sensor o Exhaust Temperature Sensor Engine Control Unit hardware (where replaced as part of Field Measure) Transmission Control Unit hardware (where replaced as part of Field Measure) o Hydraulic Control Unit hardware (where replaced as part of Field Measure) o Air intake throttle Intake manifold/charge air distributor Instrument cluster hardware (where replaced as part of Field Measure) Cylinder Head Assembly components: Valves, Springs, Valve Spring Keepers, Valve Seats, Cam Bearing Caps, Camshaft, and Manifold Studs Engine timing chain Turbocharger, including VGT actuator Coolant thermostat (where replaced as part of Field Measure) Crankcase Ventilation Valve (including line and heating element)
Covered Parts. The Extended Modification Warranty shall cover the cost of all parts and labour needed to repair the items listed below:
Catalysts o Diesel Oxidation Catalyst o Diesel Particulate Filter Assembly o Selective Catalytic Reduction (SCR) Catalyst Diesel Exhaust Fluid (DEF) System o DEF Injector o DEF Injector Controller o DEF Supply Module o DEF Pump o Temperature Sensor Unit Parts of the Fuel System o Fuel Injectors Parts of the Exhaust Gas Recirculation (EGR) System o EGR Cooler (including bypass control) o EGR Valve o EGR Temperature Sensor o EGR duct Other Sensors That Are Covered o sensor where equipped after Field Measure) o NOx Sensors o Intake Manifold Pressure Sensor o Particulate Matter Sensor o Exhaust Temperature Sensor Engine Control Unit hardware (where replaced as part of Field Measure) Transmission Control Unit hardware (where replaced as part of Field Measure) o Hydraulic Control Unit hardware (where replaced as part of Field Measure) o Air intake throttle Intake manifold/charge air distributor Instrument cluster hardware (where replaced as part of Field Measure) Cylinder Head Assembly components: Valves, Springs, Valve Spring Keepers, Valve Seats, Cam Bearing Caps, Camshaft, and Manifold Studs Engine timing chain Turbocharger, including VGT actuator Coolant thermostat (where replaced as part of Field Measure) Crankcase Ventilation Valve (including line and heating element)
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Newbie
Joined: Jul 2023
Posts: 5
Likes: 0
From: Vancouver
2015 Mercedes-Benz GLK250
I just encountered the same issue on mine coming off the highway I couldn’t downshift to get more speed and paddle shifts were not working or manual mode. I pulled over turned it off and back on and it was fine after that. Seems like a software issue, I just got a fresh oil change from the MB dealer and they did the water pump Diag recall so not sure if any of this had to do with it but has never happened before.
curious @amanj did you issue get resolved ?
curious @amanj did you issue get resolved ?
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Junior Member
Joined: May 2016
Posts: 41
Likes: 14
From: Portland, OR
2014 Mercedes GLK250, 2007 Mazda 3 GT, 2004 Honda XR400R
This exact thing happened to me last week. I felt a very slight clunk, the transmission dropped from D7 to D6, I lost about half my throttle and paddles didn't work. I got the car home okay, and the next morning it was fine again. Going to schedule a service before I hit 120k since the AEM covers the transmission as well.
Newbie
Joined: Jul 2023
Posts: 5
Likes: 0
From: Vancouver
2015 Mercedes-Benz GLK250
This exact thing happened to me last week. I felt a very slight clunk, the transmission dropped from D7 to D6, I lost about half my throttle and paddles didn't work. I got the car home okay, and the next morning it was fine again. Going to schedule a service before I hit 120k since the AEM covers the transmission as well.
hope this helps.
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