Mercedes-Benz GLK-Class Reliability — Best and Worst Years by the Data

Quick answer

The 2010 draws 6.29 complaints per run and the 2013 2.93, a 2.1-fold gap within the same model. Half of all complaints arrive by 5 years of age, so 89.6% land after the 4-year basic warranty ends. The system owners report most is Air Bags, with 619 complaints, typically at 5.2 years.

Mercedes-Benz GLK-Class years to avoid — and the best ones

FIG.01·Mercedes-Benz GLK-Class — complaint rate by model year
Model year	Per run	Complaints	Runs	Enough history?
2015	4.31	125	29	yes
2014	3.34	117	35	yes
2013	2.93	135	46	yes
2012	6.04	163	27	yes
2011	5	130	26	yes
2010	6.29	220	35	yes

ROWS 6·SOURCE NHTSA complaints, grouped by VIN production run

Does the market discount it? In our listings a 2010 GLK-Class asks a median $6,995, against $7,150 for a 2011, the next model year: about the same, so the price shows no discount for its complaint record.

Among the 6 Mercedes-Benz GLK-Class years with enough history, the three to walk away from are 2010, 2012, 2011; the three worth hunting are 2013, 2014, 2015.

When it starts to break

FIG.02·Mercedes-Benz GLK-Class — age at failure
Age at failure	Complaints	Running total	Warranty
0 years	30	3.4%	covered
1 year	13	4.9%	covered
2 years	16	6.7%	covered
3 years	33	10.4%	covered
4 years	156	28.1%	you pay
5 years	221	53.1%	you pay
6 years	152	70.2%	you pay
7 years	77	79%	you pay
8 years	59	85.6%	you pay
9 years	37	89.8%	you pay
10 years	19	92%	you pay
11 years	23	94.6%	you pay
12 years	29	97.9%	you pay
13 years	15	99.5%	you pay
14 years	3	99.9%	you pay
15 years	1	100%	you pay

ROWS 16·SOURCE NHTSA complaints with incident dates

Basic warranty on this car is 4 years / 50,000 miles. Only 10.4% of reported failures happen inside it — the remaining 89.6% come out of the owner's pocket. Powertrain cover (4 years / 50,000 miles) reaches further, but it only covers the engine and transmission, which account for about 3% of the complaints here.

What actually fails — and at what age

What waits further out is Air Bags at 5.2 years — past every basic warranty, and the bill lands on whoever owns the car then.

FIG.03·Mercedes-Benz GLK-Class — what fails and when
System	Complaints	Typical age	Crash	Fire
Air Bags	619	5.2 yrs	12	—
Fuel/propulsion System	73	8.5 yrs	2	2
Unknown Or Other	38	6.1 yrs	2	—
Service Brakes	37	7.6 yrs	7	3
Electrical System	35	6.2 yrs	4	2
Steering	31	7.8 yrs	3	3
Structure	24	7.6 yrs	5	—
Power Train	23	5.8 yrs	—	—

ROWS 8·SOURCE NHTSA complaints

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Everything on the Mercedes-Benz GLK-Class

Recalls32 campaigns Common problems951 complaints Check a VINAgainst this exact build DimensionsSize, weight, generations Used prices959 listings What yours is worthValue by year & mileage Insurance costEstimated per year Window stickerOriginal Monroney label Decode a VINWhat each character means About this car2010–2020

Frequently asked questions

Is the Mercedes-Benz GLK-Class reliable?

By complaints per production run it is worse than typical: 4.66 against 3.73 for the average car.

Which GLK-Class years should you avoid?

By complaints per production run, 2010, 2012, 2011. The cleanest years old enough to judge are 2013, 2014, 2015. Years newer than 6 are left out: complaints keep arriving for years after a car is sold.

When do GLK-Class problems usually start?

Half of all complaints arrive by 5 years of age. The most reported system is Air Bags, typically at 5.2 years, followed by Fuel/propulsion System.

Will the warranty cover GLK-Class problems?

Mostly not: basic cover is 4 years / 50,000 miles, and only 10.4% of reported failures fall inside it. Powertrain cover lasts longer, but engine and transmission make up about 3% of the complaints here.

Complaint records from NHTSA, grouped by VIN production run (characters 1–11). Rates, age-at-failure and warranty coverage computed by ForCar. Model years newer than 6 years are excluded from rankings — complaints accumulate for a decade (how we measure). Last updated Nov 2026. — ForCar Reviewed by Denis Kataev, founder of ForCar.

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