AI Damage2015 Mercedes-Benz GLK350: common problems
Owners of the 2015 Mercedes-Benz GLK350 filed 114 complaints with NHTSA, most often about air bags and electrical system. Details by component below, with sources.
Key figures
- Owner complaints
- 114
- involving a crash
- 4
What fails most often
- 1 Air bags 74% of all complaints
- 2 Electrical system 6% of all complaints
- 3 Fuel/propulsion system 4% of all complaints
- 4 Powertrain 4% of all complaints
- 5 Steering 4% of all complaints
- 6 Vehicle speed control 4% of all complaints
- 7 Electronic stability control 4% of all complaints
- 8 Engine 3% of all complaints
- Air bags: 84 complaints (74% of all), 2 of them with a crash reported by the owner.
- Electrical system: 7 complaints (6% of all), 1 of them with a crash reported by the owner.
- Fuel/propulsion system: 5 complaints (4% of all).
- Powertrain: 5 complaints (4% of all).
- Steering: 5 complaints (4% of all), 1 of them with a crash reported by the owner.
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 3.5 L · petrol · 6 cyl
- automatic, 7-speed
Drive: RWD, 4WD
Symptoms owners describe
How many of the 114 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Air bags | 84 | 2 | 0 |
| Electrical system | 7 | 1 | 0 |
| Fuel/propulsion system | 5 | 0 | 0 |
| Powertrain | 5 | 0 | 0 |
| Steering | 5 | 1 | 0 |
| Vehicle speed control | 5 | 2 | 0 |
| Electronic stability control | 4 | 1 | 0 |
| Engine | 3 | 0 | 0 |
| Service brakes | 3 | 2 | 0 |
| Lane departure | 2 | 0 | 0 |
| Structure | 2 | 1 | 0 |
| Wheels | 2 | 0 | 0 |
| Backover prevention | 1 | 0 | 0 |
| Exterior lighting | 1 | 0 | 0 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
On june 16,2017, while I was driving on freeway, I tried to slowed down but it turned out to accelerate suddenly at around 85mph, the steering system was messed up and I lost control of my car , the more I try to brake the faster the car crashed , so it crashed to the right side and rolled over down to the ditch , I…
I would have been burnt alive without people using a big rock to break the window and pulling me out . Due to the steering and engine malfunction , my car crashed and I couldn't open the door nor windows .
Hello. Since I bought this car in 2015. Every now and again it will go into park when driving and tge car will stop suddenly. It has done it a few times over the years and itâs quite scary. Mercedes has put me off on you, without addressing the situation or looking at the car, unless I pay first it.
He took the back seats out and there was a pool of gas sitting on the fuel pump. He had me start the car and it immediately started spewing from the fuel pump inside the car. I did not know I could report a complaint so I did not take pictures.
A [XXX] search for fuel leak on Mercedes Benz (MB) returned a number of hits for problems with leaks around fuel tank components on the GLK and other MB models. Upon removal of the rear seat and a check under the two fuel tank covers, I found gasoline pooled on a concave area on top of the Fuel Suction Pump Assembly,…
It appears that the seat heater causes the leather to melt. The leather has melted and peeled and is flaking.
There are two issues with my vehicle, both started recently. The mileage is only around 33000 miles. The two front tire pressure warnings keep coming on, and I have tried multiple times to correct this, doesn't matter if it exactly correct on reading for pump, or above or below, it just keeps saying they need…
The vehicle was not taken to be diagnosed or repaired. The manufacturer was contacted and stated that the VIN was not under recall. The failure mileage was approximately 62,000.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 3,262 of 36,656 model years in the NHTSA data (top 9% most complained about).
On average one model year of the GLK350 has 100 complaints (9 years in the data). This year has 114, about average.
What to check before buying
- Air bags. Check the SRS light, stored codes and airbag/curtain status after any impact.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Fuel/propulsion system. Fuel smell, leaks, rough running, fuel-system codes.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
Other years of this model
Questions and answers
What are the most common problems with the 2015 Mercedes-Benz GLK350?
Owner complaints to NHTSA most often mention: air bags, electrical system, fuel/propulsion system. Total complaints: 114. The most frequent symptoms in complaint texts: warning lights, check engine (5%), fuel system, fuel smell (4%), steering or power steering problems (3%).
How many service bulletins (TSB) were issued for the 2015 Mercedes-Benz GLK350?
NHTSA lists 0 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2015 Mercedes-Benz GLK350 from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2015 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-05.