Is the 2015 Mercedes-Benz GLK350 reliable?

The 2015 Mercedes-Benz GLK350 has 135 complaints filed with NHTSA (0.8x the segment average). Our reliability verdict: above-average. Most common issue: AIR BAGS problems.

What are common problems with the 2015 Mercedes-Benz GLK350?

Top problems: AIR BAGS (84 complaints, avg repair $500); ELECTRICAL (7 complaints, avg repair $500); FUEL SYSTEM (6 complaints, avg repair $500). Issues typically appear around 50K miles.

Are there any recalls on the 2015 Mercedes-Benz GLK350?

No recalls have been issued for the 2015 Mercedes-Benz GLK350.

How much does it cost to fuel a 2015 Mercedes-Benz GLK350?

The 2015 Mercedes-Benz GLK350 gets 22 MPG combined. At current US average gas prices, driving 12,000 miles per year costs roughly $2182. See the interactive fuel cost calculator on this page for state-specific pricing.

How much does it cost to insure a 2015 Mercedes-Benz GLK350?

Estimated US average full-coverage insurance for the 2015 Mercedes-Benz GLK350 is approximately $2,079/year (suv-luxury class). Actual quotes vary heavily by state, driver age, driving record, and credit — see the interactive insurance estimator on this page for state-specific pricing.

2015 Mercedes-Benz GLK350

Problems, Recalls & Reliability Report

Above Average

Quick Summary

The 2015 Mercedes-Benz GLK350 has 135 owner complaints filed with NHTSA — that's 0.8x the segment average of 159. The most common issue is air bags problems (62% of all complaints), specifically: 2015 glk mercedes benz. consumer writes in regards to defective side curtain airbag. *ld the consumer stated as a result from the accident, has suffered from hearing loss and chronic tinnitus. the consumer believed that the volume of the explosion caused by the deployment of the airbag exceeded i. ⚠️ 4 fire reports filed.

4 fire reports 7 crash reports 6 injuries

135

Total Complaints

Recalls Issued

—/5

Safety Stars

0.8x

vs Segment Avg

Known Problems(top 5 of 8)

AIR BAGS

84 complaints

62%

• 2015 GLK MERCEDES BENZ. CONSUMER WRITES IN REGARDS TO DEFECTIVE SIDE CURTAIN AIRBAG. *LD THE CONSUMER STATED AS A RESULT FROM THE ACCIDENT, HAS SUFFERED FROM HEARING LOSS AND CHRONIC TINNITUS. THE CONSUMER BELIEVED THAT THE VOLUME OF THE EXPLOSION CAUSED BY THE DEPLOYMENT OF THE AIRBAG EXCEEDED I
• TAKATA RECALL SHOULD HAVE BEEN DONE BEFORE THE END OF MARCH 2018 ACCORDING TO A LETTER I RECEIVED. THE MERCEDES DEALERSHIP KEPT TELLING ME THAT THE AIRBAGS WERE OK, OR THAT THEY DO NOT HAVE REPLACEMENTS AS YET. I HAD AN ACCIDENT YESTERDAY, SO I WOULD LIKE TO INFORM EVERY OWNER OF THE PROBLEM AIRBAGS
• TL* THE CONTACT OWNS A 2015 MERCEDES-BENZ GLK350. THE CONTACT STATED THAT THE MANUFACTURER FAILED TO PROVIDE THE PART WITHIN A REASONABLE TIME FRAME FOR MANUFACTURER RECALL NUMBER: 2019010001 (AIR BAGS). THE MANUFACTURER INDICATED THAT THE PART MAY BECOME AVAILABLE IN MID MAY OF 2020. THE DEALER WAS

Typical onset: 50K miles Est. repair: $500💥 2 crashes

“2015 GLK MERCEDES BENZ. CONSUMER WRITES IN REGARDS TO DEFECTIVE SIDE CURTAIN AIRBAG. *LD THE CONSUMER STATED AS A RESULT FROM THE ACCIDENT, HAS SUFFERED FROM HEARING LOSS AND CHRONIC TINNITUS. THE CONSUMER BELIEVED THAT THE VOLUME OF THE EXPLOSION CAUSED BY THE DEPLOYMENT OF THE AIRBAG EXCEEDED I”

— NHTSA complaint filing

When Problems Appear on the 2015 Mercedes-Benz GLK350

Based on 37 owner complaints that included an odometer reading. Median mileage at time of complaint: 28K miles. Most complaints cluster in the 0-30K miles range.

Overall complaint distribution by mileage

0-30K

30-60K

60-100K

100-150K

150-200K

200K+

AIR BAGS

Later than typicalmedian 42K mi · 10 reports

0-30K

30-60K

60-100K

100-150K

150-200K

200K+

Mileage figures are self-reported by owners in NHTSA complaint filings. Peak bucket = the mileage range with the most complaints for that component; it reflects when owners noticed and reported problems, not necessarily when the fault first occurred.

Fuel Cost Calculator for 2015 Mercedes-Benz GLK350

Live EIA prices

Annual miles driven: 12,000

Your state (affects local gasoline price)

Per year

$2,182

Per month

$182

Per mile

18.2¢

MPG

City driving (worst-case MPG)

$2,527/yr

Highway driving (best-case MPG)

$1,847/yr

Based on EPA fuel-economy ratings and EIA weekly retail prices (2026-07-20). Real-world cost varies with driving style, trim/engine, terrain, and traffic.

5-Year Gas Price History

EIA weekly retail data · 2021 → today

Show:

Current

$4.00

5-year low

$2.78

5-year high

$5.01

Since 2021

+27%

Source: US Energy Information Administration weekly retail gasoline prices.

Estimated Insurance Cost for 2015 Mercedes-Benz GLK350

Estimate only, not a quote. Modeled from NAIC + HLDI averages for a hypothetical 35-year-old driver with clean record + full coverage. Your actual quote depends heavily on your age, driving history, credit, ZIP code, and insurer.

Your state (affects local premium average)

Full coverage / year

$2,079

Full coverage / month

$173

Liability only / year

$732

vs US avg

+24%

How this estimate is calculated

US base full-coverage premium$1674

× state (US)1.00x

× vehicle class (suv-luxury)1.35x

× theft risk1.00x

× safety rating1.00x

× vehicle age0.92x

= Full coverage estimate$2079

Coverage assumed: 100/300/100 liability + comprehensive/collision, $500 deductibles. Data sources: NAIC 2024 + HLDI loss studies.

Maintenance & Warranty

Recommended Mercedes-Benz GLK350 Service Intervals

Oil change

10K mi / 12 mo

Tire rotation

10K mi

Brake fluid

24 months

Transmission fluid

40K mi

Engine coolant

150K mi

Spark plugs

60K mi

Cabin air filter

20K mi

Engine air filter

40K mi

Differential (AWD/4WD)

40K mi

Service A / Service B alternating schedule. Requires MB-approved oil (229.5 spec typically).

"Severe service" conditions (heavy towing, extreme temps, city stop-and-go) typically halve these intervals. Always consult your vehicle's owner's manual for the authoritative schedule.

Mercedes-Benz New-Vehicle Warranty Coverage

Bumper-to-bumper (basic)

4 yr / 50K mi

Powertrain

4 yr / 50K mi

Hybrid/EV battery

10 yr / 155K mi

Corrosion (rust perforation)

4 yr / 50K mi

Roadside assistance

4 yr / unlimited mi

EQ EV battery warranty is 10 years/155,000 miles

These are the terms for a new Mercedes-Benz. If you're buying a used 2015 GLK350, remaining coverage is usually pro-rated from the vehicle's original in-service date. Not all coverage transfers between owners — check with a Mercedes-Benz dealer for VIN-specific remaining warranty.

Estimated Repair Costs

AIR BAGS(~50K mi)

$500

ELECTRICAL(~50K mi)

$500

FUEL SYSTEM(~50K mi)

$500

SPEED CONTROL(~50K mi)

$500

STEERING(~50K mi)

$500

Estimates based on average reported repair costs. Actual costs vary by location, shop, and severity.

🔍 Pre-Purchase Inspection Checklist

Based on 135 owner complaints for this specific year, here's what to check or ask about:

☐
AIR BAGS: 2015 GLK MERCEDES BENZ. CONSUMER WRITES IN REGARDS TO DEFECTIVE SIDE CURTAIN AIRBAG. *LD THE CONSUMER STATED AS A RESULT FROM THE ACCIDENT, HAS SUFFERED FROM HEARING LOSS AND CHRONIC TINNITUS. THE CONSUMER BELIEVED THAT THE VOLUME OF THE EXPLOSION CAUSED BY THE DEPLOYMENT OF THE AIRBAG EXCEEDED I
Typically appears around 50K miles. Repair cost ~$500
☐
ELECTRICAL: WE WERE DRIVING ON NORMAL FREEWAY SPEED ALONG INTERSTATE 5 SOUTH APPROACHING FORT TEJON TOWARDS LOS ANGELES WHEN SUDDENLY THE DASHBOARD DISPLAYED THE MESSAGE " INOPERATIVE. CHECK OPERATOR'S MANUAL". WITH THIS MESSAGE, THE CAR SLOWED DOWN AND ULTIMATELY SHUT OFF ITS POWER ON US. FORTUNATELY, WE WERE
Typically appears around 50K miles. Repair cost ~$500
☐
FUEL SYSTEM: MESSAGE DASHBOARD INDICATOR (MDI) READ "INOPERATIVE. SEE OPERATOR'S MANUAL" WITH OTHER MALFUNCTION LIGHTS INCLUDING CHECK ENGINE LIGHT (CEL). TURNED CAR OFF AN ON AND ONLY THE CEL REMAINED. ALSO, THERE WAS A RECURRING TICKING NOISE THAT PRECEDED AFOREMENTIONED ISSUES THAT I ALSO REPORTED. DEALERSHIP
Typically appears around 50K miles. Repair cost ~$500
☐
SPEED CONTROL: WHILE EXITING THE HWY THE CAR SLOW DOWN ON ITS OWN FROM ABOUT 60 TO AROUND 45 WITHOUT BREAKING. INOPERATIVE SEE OWNER'S MANUAL APPEARED ON THE DASHBOARD AND THE CAR STARTED LOOSING POWER. WHEN I TRIED TO ACCELERATE IT DID WOULD NOT SPEED UP PASS 50. AFTER COMING TO A TRAFFIC LIGHT I TRIED TO ACC
Typically appears around 50K miles. Repair cost ~$500
☐
General: Get a pre-purchase inspection from an independent mechanic ($100-$200)