2014 Mercedes-Benz GLK350 Engine Problems
- Complaints
- 4about this part
- Share
- 4%of 104 total for the year
- Median mileage
- 68,600miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 4 complaints about the engine of the 2014 Mercedes-Benz GLK350, 4% of the 104 complaints for this model year. Where a mileage was given, the median is 68,600 miles. 1 a fire, according to the filers.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“The contact owns a 2014 Mercedes-Benz GLK350. The contact stated that there was an abnormal fuel odor inside and outside vehicle. The check engine, TPMS, and several other unknown warning lights were illuminated. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 100,000.”
NHTSA complaint #11750586, filed 2026-07, 100,000 miles“The contact owns a 2014 Mercedes-Benz GLK350. The contact stated that while driving at various speeds, the vehicle lost motive power and stalled with the check engine and traction control warning lights illuminated. The vehicle was taken to the local dealer who serviced the vehicle however, the failure reoccurred. No further information was available. The manufacturer was notified of the failure, but no assistance was offered. The failure mileage was 61,000.”
NHTSA complaint #11528333, filed 2023-06, 61,000 miles“The contact owns a 2014 Mercedes-Benz GLK350. The contact stated that the vehicle leaked an excessive amount of oil onto the engine compartment. In addition, the contact noticed a burning oil smell coming through the air ventilation system. Furthermore, the oil light remained illuminated. The vehicle was taken to be repaired, but the failure recurred. The manufacturer was not made aware of the issue. The failure mileage was 14,000. Updated 04/14/16”
NHTSA complaint #10839562, filed 2016-03, 14,000 miles“The contact owns a 2014 Mercedes-Benz GLK350. The contact stated that the ABS, check engine, and traction control warning lights were illuminated. The vehicle was taken to an independent mechanic, who informed the contact that they could not diagnose the vehicle as the diagnostic link connector was missing from the vehicle. The contact stated that she verified that the diagnostic link connector was not in the location indicated in the Owner’s Manual. The contact stated that the vehicle was purchased used. The dealer and the manufacturer were not notified of the failure. …”
NHTSA complaint #11517127, filed 2023-04, 76,200 milesRelated service bulletins
- 11031648Oct 5, 2021Mercedes-Benz USA, LLC will provide an Extended Modification Warranty for each vehicle that has received the Approved Emission Modification. The Extended Modification Warranty…
- 10058563Jul 6, 2015Xentry (mercedes): stored in engine control unit (ecu) is fault to exhaust back pressure sensor causing engine to be in limp home mode and diagnosis warning lamp activated. Model…
- 10058548Jun 4, 2015Xentry (daimler): stored in engine control unit are faults relating to throttle valve actuator and/or oxygen sensor due to occasional transition resistance at contacts, causing…
- 10135598Mar 25, 2015Engine diagnosis warning lamp lights up in instrument cluster, fault code U145400: "Implausible data were received from the ethanol sensor"
Engine: other model years
Other parts of the 2014 Mercedes-Benz GLK350
62 complaintsFuel system
8 complaintsBrakes
7 complaintsOther or unknown
5 complaintsBody and structure
5 complaintsElectrical system
4 complaintsSteering
4 complaintsVisibility (wipers, defrost, mirrors)
4 complaintsSeats
3 complaintsSuspension
3 complaintsTransmission and drivetrain
3 complaintsWheels
3 complaints
← All problems reported for the 2014 Mercedes-Benz GLK350
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Nov 1, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology