Most common 2014 Mercedes-Benz GLK350 problems
Share of the 104 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Mercedes-Benz GLK350 complaints by model year
Best GLK350 years: 2007, 2014. Years to avoid: 2010. Compare all years →
2014 Mercedes-Benz GLK350 recalls (5)
Communication
Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2013-2017 vehicles due to a software fault that may cause the date and time for the emergency call system (eCall) to differ from the actual date and time, potentially relaying an inaccurate vehicle location.
Remedy: MBUSA has initiated an Over the Air (OTA) remote update. MBUSA will also notify owners, and dealers will check software for a successful OTA or update the communication module software as needed, free of charge.
Air bags › Frontal › Passenger side › Inflator module
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2014 C250, C300 4Matic, C350, C63 AMG, E350 4Matic Coupe, E350 Cabrio, E350 Coupe, SLS AMG Cabrio, SLS AMG Coupe, 2014-2015 C250 Coupe, C350 4Matic Coupe, C350 Coupe, C63 AMG Coupe, GLK 350, GLK250 BlueTec 4Matic, GLK350 RWD, 2015-2017 E400 4Matic Coupe, E400 Cabrio, E400…
Remedy: MBUSA will notify owners, and dealers will replace the passenger frontal air bag module, free of charge. The recall began March 29, 2019. Owners may contact MBUSA customer service at 1-800-367-6372.
Air bags › Frontal
Mercedes-Benz USA, LLC. (MBUSA) is recalling these vehicles: 2014-2018 CLA250, CLA250 4Matic, CLA45 AMG 4Matic, 2015-2018 GLA250, GLA250 4Matic, GLA45 AMG 4Matic, C300 4Matic, C63S AMG, 2012-2014 C250, C350, C300 4Matic, E550 4Matic, 2013-2014 C63 AMG, 2012-2015 C250 Coupe, C350 Coupe, C63 AMG Coupe, 2013-2015 C350 4Matic…
Remedy: MBUSA will notify owners, and dealers will add sufficient grounding to the steering components, free of charge. The recall began in December 6, 2017. Owners may contact MBUSA customer service at 1-877-496-3691.
Steering
Mercedes-Benz USA LLC. (MBUSA) is recalling certain 2013-2014 C250, C300 4MATIC, GLK250 4MATIC BLUETEC and GLK350 vehicles, 2013 C250 Coupe, C350, C350 4MATIC Coupe, C350 Coupe and C63 AMG Coupe vehicles, and 2013-2015 GLK350 4MATIC vehicles.
Remedy: MBUSA will notify owners, and dealers will inspect the steering coupling connecting bolt, tightening it as necessary, free of charge. The recall began May 2017.
Electrical system › Software
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2016 AMG GT-S, GLC300, CLA250 and GLE300d 4Matic vehicles, 2013 C250, E350 BlueTec and G63 AMG vehicles, 2008-2014 C300 vehicles, 2013-2014 C300 4Matic and ML350 4Matic vehicles, 2009 C350 vehicles, 2014 CLS550, E350 4Matic, E350 Coupe 4Matic, E350 Wagon 4Matic, GLK350 and…
Remedy: MBUSA will notify owners, and dealers will update software in the affected control units, free of charge. The recall began April 21, 2017. Owners may contact MBUSA customer service at 1-800-367-6372.
NHTSA defect investigations
Federal safety investigators have looked into a possible defect involving the 2014 Mercedes-Benz GLK350:
Desiccated Air Bag Inflator Rupture
From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited.
What 2014 Mercedes-Benz GLK350 owners say
Air bags all 62 →
The contact owns a 2014 Mercedes-Benz GLK350. The contact stated that while operating the vehicle, the driver's side air bag warning light remained illuminated. The cause of the failure was not yet determined. The local dealer was notified of the failure, but no assistance was provided. The manufacturer was not yet contacted. The failure mileage was 58,000.
The following are malfunctions that are a high risk when driving: airbags ball joints coolant control arms electrical power system It is a risk when driving due to the ball joints and control arms not properly secured. Engine warning light
Fuel & propulsion system
The contact owns a 2014 Mercedes-Benz GLK350. The contact stated that while driving he noticed a fuel odor throughout the vehicle. The contact referenced NHTSA Campaign Number: 12V557000 (Fuel System, Gasoline). Additionally, the contact stated that when he attempted to refuel the vehicle from a half tank, gasoline started spilling from the filler neck unto the exhaust pipes. The dealer was notified of the failure and an appointment was scheduled. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure and the contact stated that he was redirected to the manufacturer's website. The failure mileage was approximately 90,000.
The contact owns a 2014 Mercedes-Benz GLK350. The contact stated while starting the vehicle after refueling, there was an abnormal gasoline odor inside the vehicle. The vehicle was taken to the dealer and the contact was informed that the fuel pump was leaking onto the rear seats. The contact was informed that the fuel pump needed to be replaced. The vehicle was not repaired. The manufacturer was contacted, and a case was filed. The failure mileage was 64,000.
Brakes
The contact owns a 2014 Mercedes-Benz GLK350. The contact stated that the ABS, check engine, and traction control warning lights were illuminated. The vehicle was taken to an independent mechanic, who informed the contact that they could not diagnose the vehicle as the diagnostic link connector was missing from the vehicle. The contact stated that she verified that the diagnostic link connector was not in the location indicated in the Owner's Manual. The contact stated that the vehicle was purchased used. The dealer and the manufacturer were not notified of the failure. The vehicle was not diagnosed nor repaired. The failure mileage was approximately 76,200.
The contact owns a 2014 Mercedes-Benz GLK350. The contact stated that the parking brake failed to engage as needed. There were no warning lights illuminated. The vehicle was taken to the local dealer for an inspection, and it was determined that the parking brake release had failed to snap upwards. The contact stated that the pedal was releasing slowly. The vehicle was not repaired. The manufacturer was contacted, but no additional assistance was provided. The approximate failure mileage was 58,000.
2014 Mercedes-Benz GLK350 engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 3.5L 6-cyl | 7-speed automatic | RWD | 19 / 26 / 22 |
EPA ratings. Class: Small SUV.
Frequently asked questions
Is the 2014 Mercedes-Benz GLK350 a good car?
Based on 104 owner complaints filed with NHTSA, the 2014 GLK350 rates average: 22% fewer complaints than a typical year of the GLK350 at the same age. It is one of the best GLK350 years by this measure. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2014 Mercedes-Benz GLK350?
The air bags — 62 complaints, 60% of all complaints for this model year. Next are the fuel & propulsion system (8) and brakes (7).
How many recalls does the 2014 Mercedes-Benz GLK350 have?
There are 5 recalls for the 2014 Mercedes-Benz GLK350, the most recent from November 1, 2019 (communication). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
What are the best and worst years of the Mercedes-Benz GLK350?
The best years by complaints, compared at the same age, are 2007 and 2014. Years to avoid or approach with caution: 2010. See the full Mercedes-Benz GLK350 years comparison.
At what mileage do 2014 Mercedes-Benz GLK350 problems happen?
The median mileage reported in complaints is about 38,000 miles; 54% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.