This page covers 4 recalls, 114 owner complaints and EPA fuel economy for the 2015 Mercedes-Benz Glk350.
21–22 mpg combined
10.7–11.2 L/100km
Small Sport Utility Vehicle 2WD
Fuel economy data from fueleconomy.gov (EPA / U.S. Dept. of Energy). Annual cost based on 15,000 mi/yr at 55% city driving and current fuel prices. MPG is U.S. gallons; L/100km converted. Ranges reflect the 2 tested variants for this model year.
The dominant complaint pattern for the 2015 GLK350 centers on the airbag and passive restraint system, which accounts for the overwhelming share of reports. The most common issue owners describe is the passenger seat occupant sensor triggering a persistent dashboard warning, typically a "front passenger airbag malfunction" or "service required" message, even with an adult seated normally. Many owners report this warning appearing repeatedly, sometimes clearing on its own and returning. A separate but notable pattern involves the electronic ignition or key recognition system: owners describe the transmission abruptly shifting into park while the vehicle is still moving at low speed, which several describe as an abrupt jolt. Steering and electrical complaints each represent a small share of reports, with no single symptom standing out at volume. The passenger seat sensor warning is by far the most consistently repeated complaint across this model year's owner reports.
114
Total Complaints
4
Crash-Related
2
Fire-Related
4
With Injuries
By System
The 2015 Mercedes-Benz GLK350 has 4 recalls, the most serious involving a steering coupling bolt that may not be properly tightened, which can cause a sudden and complete loss of steering control while driving.
Two of the remaining recalls involve the airbag system. The passenger-side airbag inflator is subject to the widespread Takata recall: the inflator can rupture and send sharp metal fragments into the cabin, posing a risk of serious injury or death to the front passenger or anyone seated nearby. Separately, the driver's airbag can deploy without warning while the vehicle is being driven, which raises the risk of both injury and a crash. On the electronics side, a software fault in the emergency call system can cause it to report an incorrect date, time, and vehicle location when an emergency call is placed, which may delay first responders in reaching the scene.
At a glance
What can fail
A software error causes the eCall emergency system's date and time to be incorrect, which may result in an inaccurate vehicle location being sent during an emergency call.
What the fix does
Mercedes-Benz will send a remote software update to your vehicle. Dealers will verify the update worked or install a new communication module software at no cost.
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Complaints are owner-reported and reflect individual experiences, not confirmed defects. They are distinct from recalls. Data sourced from the national vehicle safety complaint database. See trending complaints →
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The passenger front air bag inflator may explode due to propellant breaking down after prolonged exposure to high humidity, heat, and temperature changes.
What the fix does
Dealers will replace the passenger front air bag module at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The driver's airbag may deploy unexpectedly if the steering components lack proper grounding and the airbag clockspring is broken, allowing electrostatic discharge to trigger deployment.
What the fix does
Dealers will add grounding to the steering components to prevent electrostatic discharge from triggering the airbag.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The bolt connecting the steering coupling may not be tight enough, which could cause loss of steering control.
What the fix does
Dealers will inspect and tighten the steering coupling bolt as needed at no charge.
Summarized — see the official notice for exact wording, dates, and contacts.
