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Fuel systemPart report

2012 Mercedes-Benz GLK350 Fuel system Problems

Complaints
13about this part
Share
8%of 167 total for the year
Median mileage
75,000miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 13 complaints about the fuel system of the 2012 Mercedes-Benz GLK350, 8% of the 167 complaints for this model year. Where a mileage was given, the median is 75,000 miles. 1 recall campaign on record is filed under a similar system.

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 glk smells like gas any time it's fueled up. I never top it off because if I do, it leaks fuel until I get down to 3/4 of a tank. I took it in to get looked at and the dealership warranty dept. Told me my VIN number was not one of the ones affected by the sameexat type of fuel leak as others in the recall! I am sorry that I ever bought this vehicle, I will never buy Mercedes-Benz again1”

NHTSA complaint #11119889, filed 2018-08, 75,000 miles

“Since new the glk would smell like gas any time you fueled up. I never topped it off because the dealer told me that may be a reason you smell the fuel. I took it in to get looked at an they told me it's common it's just the evap system working. That's fine but after a few years anytime I filled up I noticed it would start leaking onto my garage floor. I took it in to the dealer and they told me it's out of warranty by a month an this would cost over a thousand to get fixed. I told them I read that a lot of mb are getting recalled due to the fuel leak. And they told me mine is not one of them. …”

NHTSA complaint #11101947, filed 2018-06, 38,000 miles

“I smelled gasoline in my car didn’t think of anything . Till today when i pumped gas it smelled very strong got home parked my car i notice a leak i look closer under and it’s leaking gas .just got this car 2 months ago There was a safety recall about this issue back in 2013 and I was not sure if this issue was corrected before on my vehicle and think this needs to be recalled again. Please investigate”

NHTSA complaint #11615868, filed 2024-09

“I smell gasoline every time I fill up the gas tank and don't smell it when not quite full. I haven't check yet but I think that the fuel pump flange has deteriorated. My co-worker has the same exact issue and he found out that it was the fuel pump flange. There was a safety recall about this issue back in 2013 and I was not sure if this issue was corrected before on my vehicle and think this needs to be recalled again. Please investigate. Thank you. Sincerely,”

NHTSA complaint #11568914, filed 2024-01

“My 2012 GLK350 leaking gas from under the rear right passenger seat, where the gas cap located. we fill up gas when we came back to home and park in the garage gas smell was very strong We thought may be because of spill some gas while Pumping. Next day gas smell was still strong inside of garage. I found gas leaking from under the rear right passenger seat. gas was dripping on the plastic cover Panel. I started google to find out what is the problem. …”

NHTSA complaint #11503713, filed 2023-01

Related recalls

Related service bulletins

Fuel system: other model years

YearComplaintsShare of year
201565%
201488%
201386%
2012138%
20112116%
20103012%

Other parts of the 2012 Mercedes-Benz GLK350

Air bags
132 complaints
Other or unknown
7 complaints
Brakes
6 complaints
Electrical system
4 complaints
Suspension
4 complaints
Seats
3 complaints
Steering
3 complaints
Transmission and drivetrain
3 complaints
Engine
2 complaints
Body and structure
2 complaints
Wheels
2 complaints
Electronic stability control
1 complaints

← All problems reported for the 2012 Mercedes-Benz GLK350

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 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