2014 Mercedes-Benz GLK350 Fuel system Problems
- Complaints
- 8about this part
- Share
- 8%of 104 total for the year
- Median mileage
- 72,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 8 complaints about the fuel system of the 2014 Mercedes-Benz GLK350, 8% of the 104 complaints for this model year. Where a mileage was given, the median is 72,000 miles.
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.
“We started to develop a strong smell of gas inside the vehicle. I started to research online to find that many mercedes models have the same problem, a crack develops on a cap that houses the fuel pump under the back seat inside the vehicle. This permits gas fumes to enter the vehicle, let alone actual gasoline to collect above the cap and leaking under the seat inside the vehicle. Some people try to just patch it with epoxy and attempt to replace parts. …”
NHTSA complaint #11394886, filed 2021-02, 70,000 miles“My vehicle started smelling like gas. Took it in for inspection. Mechanic found a leak in the fuel assembly, resulting in gasoline pooling inside the vehicle under the back seat and leaking out through the bottom of the vehicle. I went online and noticed a recall was issued for 2011 and 2012 models. Ongoing issues with fuel modules leaking although no visible cracks were present. I contacted Mercedes to have them review if this would be covered under their recall and they declined saying they did not want to cover this under their recall. …”
NHTSA complaint #11511839, filed 2023-03“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 while starting the vehicle after refueling, there was an abnormal gasoline odor inside the vehicle. The vehicle was taken to the dealer and the contact was informed that the fuel pump was leaking onto the rear seats. The contact was informed that the fuel pump needed to be replaced. The vehicle was not repaired. The manufacturer was contacted, and a case was filed. The failure mileage was 64,000.”
NHTSA complaint #11526545, filed 2023-06, 64,000 miles“The contact owns a 2014 Mercedes-Benz GLK350. The contact stated that while driving he noticed a fuel odor throughout the vehicle. The contact referenced NHTSA Campaign Number: 12V557000 (Fuel System, Gasoline). Additionally, the contact stated that when he attempted to refuel the vehicle from a half tank, gasoline started spilling from the filler neck unto the exhaust pipes. The dealer was notified of the failure and an appointment was scheduled. The vehicle was not diagnosed or repaired. …”
NHTSA complaint #11483630, filed 2022-09, 90,000 milesRelated service bulletins
- 10167553Jul 1, 2013Combination message: "Clean fuel filter" is displayed. The fault code 162500 (water level message - Bosch) or P226997 (water level message - Delphi) or 171600 (filter load…
Fuel system: other model years
Other parts of the 2014 Mercedes-Benz GLK350
62 complaintsBrakes
7 complaintsOther or unknown
5 complaintsBody and structure
5 complaintsElectrical system
4 complaintsEngine
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