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Which year to buy
Bar height: serious owner complaints to NHTSA for that year per car on the road, against this model's usual year.
2010GOOD BUYSerious complaints 1.0× usual
225 serious complaints of 241, the most about air bags (149) and fuel system (26); per car on the road, 1.0× this model's usual year.
What owners report
“Takata recall. The contact owns a 2010 mercedes-benz glk350. The contact received notification of nhtsa campaign number: 16v081000 (air bags). The part to do the repair was not available. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue.”
An owner's complaint to NHTSA about the air bags, Dec 2016
“Two fuel tank leaks that are a fire hazard. First one was around fuel pump, cracks in plastic flange. Had repaired with a sealant. Recently another leak around the filler tube. Leak around passenger side rear wheel when filling tank. Strong smell of gasoline if not completely filled to cause leak. I would think a dangerous fire hazard.”
An owner's complaint to NHTSA about the fuel system, Sep 2021
241 owner complaints · 0 recalls · EPA combined: 18 mpg · NHTSA: Not rated · 2010 trims and features
Verdicts computed from NHTSA owner complaints, defect investigations and recalls. Cars on the road from New York State registrations. (How we judge.) Data checked 2026-10-06.
Trims and features
Engines: 3.5L 6-cyl · Drive: 4WD, RWD
2010 GLK trims
| GLK350 | GLK350 4-MATIC |
|---|
base price, seating and driver-assistance equipment from NHTSA's vehicle database (vPIC), as Mercedes-Benz reports it. Tech and comfort features (CarPlay, heated seats, sunroof) for Mercedes-Benz aren't in our data yet. "—": not verified in our sources. "Varies": standard on some versions of the trim.
Year by year
| Year | Engines | Drive | Fuel economy | Crash rating | Recalls | Owner complaints | Most-reported problem | CarPlay |
|---|---|---|---|---|---|---|---|---|
| 2015 | 2.1L 4-cyl turbo diesel 3.5L 6-cyl | 4WD, RWD | 20–27 mpg | Not rated | 0 | 133 | Air bags (91) | — |
| 2014 | 2.1L 4-cyl turbo diesel 3.5L 6-cyl | 4WD, RWD | 21–27 mpg | Not rated | 0 | 126 | Air bags (78) | — |
| 2013 | 2.1L 4-cyl turbo diesel 3.5L 6-cyl | 4WD, RWD | 21–27 mpg | Not rated | 0 | 146 | Air bags (102) | — |
| 2012 | 3.5L 6-cyl | 4WD, RWD | 18 mpg | Not rated | 0 | 171 | Air bags (136) | — |
| 2011 | 3.5L 6-cyl | 4WD, RWD | 18 mpg | Not rated | 0 | 134 | Air bags (92) | — |
| 2010 | 3.5L 6-cyl | 4WD, RWD | 18 mpg | Not rated | 0 | 241 | Air bags (149) | — |
Owner complaints are unverified reports to NHTSA, counted as filed: older years have had longer to collect them and sales aren't adjusted for, so see Which year to buy for a fair comparison. Most-reported problem: the component named in the most complaints that year. Sources: EPA, NHTSA, Apple.
Every NHTSA-rated version: crash ratings, safety tech, recalls, complaints
| Year | Version | Stars | Forward collision warning | Lane departure warning | Recalls | Complaints |
|---|---|---|---|---|---|---|
| 2015 | Mercedes-Benz GLK-Class 4 DR RWD | Not Rated | No | Optional | 6 | 133 |
| 2015 | Mercedes-Benz GLK-Class 4 DR 4WD | Not Rated | No | Optional | 6 | 133 |
| 2014 | Mercedes-Benz GLK-CLASS 4 DR 4WD | Not Rated | Optional | No | 6 | 126 |
| 2014 | Mercedes-Benz GLK-CLASS 4 DR RWD | Not Rated | Optional | No | 6 | 126 |
| 2013 | Mercedes-Benz GLK-Class 4 DR 4WD | Not Rated | Optional | Optional | 7 | 146 |
| 2013 | Mercedes-Benz GLK-Class 4 DR RWD | Not Rated | Optional | Optional | 7 | 146 |
| 2012 | Mercedes-Benz GLK-Class 4 DR AWD | Not Rated | No | No | 4 | 171 |
| 2012 | Mercedes-Benz GLK-Class 4 DR RWD | Not Rated | No | No | 4 | 171 |
| 2011 | Mercedes-Benz GLK-Class 4 DR AWD | Not Rated | No | No | 4 | 134 |
| 2011 | Mercedes-Benz GLK-Class 4 DR RWD | Not Rated | No | No | 4 | 134 |
| 2010 | Mercedes-Benz GLK-Class 4-DR w/SAB | Not Rated | No | No | 5 | 241 |
Source: NHTSA.
Every EPA-rated version: engines and combined mpg
| Year | EPA model | Engines | Combined |
|---|---|---|---|
| 2015 | GLK250 Bluetec 4matic | Auto 7-spd, 4 cyl, 2.1 L, Diesel, Turbo | 27 |
| 2015 | GLK350 | Auto 7-spd, 6 cyl, 3.5 L, SIDI; PZEV (SULEV) emissions Auto 7-spd, 6 cyl, 3.5 L, SIDI |
21–22 |
| 2015 | GLK350 4matic | Auto 7-spd, 6 cyl, 3.5 L, SIDI Auto 7-spd, 6 cyl, 3.5 L, SIDI; PZEV (SULEV) emissions |
20–21 |
| 2014 | GLK250 Bluetec 4matic | Auto 7-spd, 4 cyl, 2.1 L, Diesel, Turbo | 27 |
| 2014 | GLK350 | Auto 7-spd, 6 cyl, 3.5 L, SIDI; PZEV (SULEV) emissions Auto 7-spd, 6 cyl, 3.5 L |
21–22 |
| 2014 | GLK350 4matic | Auto 7-spd, 6 cyl, 3.5 L, SIDI; PZEV (SULEV) emissions Auto 7-spd, 6 cyl, 3.5 L, SIDI |
21 |
| 2013 | GLK250 Bluetec 4matic | Auto 7-spd, 4 cyl, 2.1 L, Diesel, Turbo | 27 |
| 2013 | GLK350 | Auto 7-spd, 6 cyl, 3.5 L, SIDI; PZEV (SULEV) emissions Auto 7-spd, 6 cyl, 3.5 L, SIDI |
21 |
| 2013 | GLK350 4matic | Auto 7-spd, 6 cyl, 3.5 L, SIDI; PZEV (SULEV) emissions Auto 7-spd, 6 cyl, 3.5 L, SIDI |
21 |
| 2012 | GLK350 | Auto 7-spd, 6 cyl, 3.5 L | 18 |
| 2012 | GLK350 4matic | Auto 7-spd, 6 cyl, 3.5 L | 18 |
| 2011 | GLK350 | Auto 7-spd, 6 cyl, 3.5 L | 18 |
| 2011 | GLK350 4matic | Auto 7-spd, 6 cyl, 3.5 L | 18 |
| 2010 | GLK350 | Auto 7-spd, 6 cyl, 3.5 L | 18 |
| 2010 | GLK350 4matic | Auto 7-spd, 6 cyl, 3.5 L | 18 |
Source: fueleconomy.gov.