2014 Mercedes-Benz GLK350 Problems
Owner-reported complaints filed with NHTSA, grouped by component
Data refreshed
What this page shows
Everything below is an owner-reported complaint submitted to NHTSA about the 2014 Mercedes-Benz GLK350, grouped by the component NHTSA recorded on the report. These are not confirmed defects, and they are not recalls. NHTSA does not verify most reports before publishing them, and a category with more reports in it is not evidence that a part is defective.
Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.
Reports by component
Ranked by how many owner reports name each component category
- Airbags6253.4%
- Fuel system86.9%
- Brakes76.0%
- Body & structure54.3%
- Visibility43.4%
- Electrical43.4%
- Engine43.4%
- Other / unspecified43.4%
- Steering43.4%
- Powertrain (other)32.6%
- Suspension32.6%
- Driver assistance21.7%
- Interior & seats21.7%
- Seat belts21.7%
- Heating & air conditioning10.9%
- Tires & wheels10.9%
Percentages are of component mentions. A single complaint can name more than one component, so these do not sum to the total complaint count.
Each component in detail
What the reports in each category say, in the owners' own words
Airbags
Reports naming the air-bag system — deployment behaviour, inflators, sensors and warning lights.
From owner reports, verbatim
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
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.
Fuel system
Reports naming fuel storage or delivery — tanks, pumps, lines, injectors and fuel leaks.
From owner reports, verbatim
The contact owns a 2014 Mercedes-Benz GLK350. The contact stated that there was an abnormal fuel odor inside and outside vehicle. The check engine, TPMS, and several other unknown warning lights were illuminated. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 100,000.
See attached document for complaint.
Brakes
Reports naming service brakes, the antilock braking system, brake hoses, master cylinders or the parking brake.
From owner reports, verbatim
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.
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.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Body & structure
Reports naming the vehicle structure, frame, body panels, doors, hood and trim.
From owner reports, verbatim
See attached document for complaint.
The contact owns a 2014 Mercedes-Benz GLK350. The contact stated that while the vehicle was at the dealer for a service appointment for the auxiliary battery replacement, the contact was informed that water was in the spare wheel storage location. The contact was informed that the water level measured to be a quarter of a foot of water. In addition, the water was also noticed to be in the auxiliary battery storage area. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 55,714.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Visibility
Reports naming windshields, glass, wipers, defrosters and mirrors.
From owner reports, verbatim
On 11/18/2023, while driving my GLK350 2014, I decided to open and later close the sunroof. As I closed the sunroof, I heard a distinct cracking sound, which caught my attention. Initially, I was unsure of the source of the sound and continued driving. It wasn't until I arrived home that I made a shocking discovery - the front black stationary window panel, located just above the windshield, had shattered unexpectedly. Prior to this incident, I had meticulously cared for my car, ensuring it was regularly maintained and kept in excellent condition. There were no visible cracks or signs of damage on the front black stationary window panel. I even hand-washed the vehicle earlier that day and inspected the panel, confirming its integrity. I had a clear view of the area around the car while I was on a ladder, ruling out the possibility of any rocks or debris causing the breakage. My adult daughter was present in the car with me as a witness to this unfortunate event. We were both astonished by the sudden and unexplained shattering of the window panel. Given the circumstances, it became evident that there is a significant safety concern regarding the GLK350 2014 model's front black stationary window panel. The shattered panel poses serious risks to the safety of both the driver and passengers. These risks include compromised structural integrity, the potential for harmful glass projectiles, and impaired visibility that could lead to accidents or hazardous driving situations. To address these urgent safety concerns, I have written this letter to request an immediate safety recall for all GLK350 2014 vehicles. It is our collective responsibility to ensure the safety and well-being of all drivers and passengers who rely on your esteemed automobile brand. Please consider the gravity of this situation and take swift action to rectify
The contact owns a 2014 Mercedes Benz GLK350. The contact stated while driving at various speeds, there was a loud sound coming from the sunroof. The contact stated that there was no warning light illuminated. The vehicle was taken to the local dealer where it was diagnosed with the cassette part that needed to be replaced. The vehicle was repaired however, after retrieving the vehicle, the contact stated that an abnormal sound was coming from the sunroof. The sunroof glass shattered and glass shards fell onto the contact. The contact then took the vehicle back to the dealer where it was diagnosed that the sunroof needed to be replaced. The contact related the failure to an unknown recall. The manufacturer was informed of the failure and informed the contact that she would receive a callback. The failure mileage was approximately 180,000.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Electrical
Reports naming the electrical system — wiring, battery, charging, control modules, infotainment and electrical accessories.
From owner reports, verbatim
1. What component or system failed or malfunctioned, and is it available for inspection upon request? -The entire electrical system failed and the power steering, SRS, and ABS systems malfunctioned. Yes, it’s available for inspection. 2. How was your safety or the safety of others put at risk? -Last night around 9 pm CST we crank the car and started to drive, (no warning light at that time) and all of a sudden the car had a warning message to start the engine or the vehicle would turn off the engine although we were already driving. The car started to show all the lights and the brakes got harder to press while we were driving about 40 miles per hour. We couldn’t stop completely at the traffic light and the SRS light came on in the dashboard. After we got off the main road, the power steering locked up as we were trying to turn into a parking lot to safely park. Even after removing the key, the engine remained on and the headlights. 3. Has the problem been reproduced or confirmed by a dealer or independent service center? -No, a dealer has not confirmed electrical problems for this specific VIN, although there has been a “blanket recall” on the models in this class. 4. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? -No, not to my knowledge. 5. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? -The battery light turned on around 9 am when I was driving my son to his appointment. Then the light went off. Later on in the day, I was able to drive approximately 30-40 miles before going home. In the evening, when driving to the grocery store, the battery light came back on and went off. After leaving grocery store, this is when the car malfunctioned. The ABS and SRS were prominent during the malfunction.
On 1/17/25, I was on my commute to my office when I noted a very strong and unpleasant odor. Thinking it was from a truck in front of me, I passed the truck, cracked my passenger window and continued the short distance to my office. After work, when I returned to my car, I noted a hole burned through my driver's side leather seat. I didn't make the connection to the odor from that morning until I arrived home and did some online research. It turns out that my front seat warmer had malfunctioned, burning all the way through the leather. This problem is well documented online in various forums in my year, make and model. In some cases I read about, driver's clothing burned. In one case I found, a child was burned. This is also a well documented problem that occurred in earlier models of Mercedes, resulting in a lawsuit and a recall. My car is currently at the dealer for repair of the faulty seat warmer, replacement of the burned foam cushion, and replacement of the leather seat cover. This could have been so much worse had I been earlier in my commute, or on a highway where I could not have pulled over. It seems like this problem should prompt a recall.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Engine
Reports naming the engine itself — including stalling, misfires, oil consumption, cooling and internal engine components.
From owner reports, verbatim
The contact owns a 2014 Mercedes-Benz GLK350. The contact stated that there was an abnormal fuel odor inside and outside vehicle. The check engine, TPMS, and several other unknown warning lights were illuminated. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 100,000.
The contact owns a 2014 Mercedes-Benz GLK350. The contact stated that while driving at various speeds, the vehicle lost motive power and stalled with the check engine and traction control warning lights illuminated. The vehicle was taken to the local dealer who serviced the vehicle however, the failure reoccurred. No further information was available. The manufacturer was notified of the failure, but no assistance was offered. The failure mileage was 61,000.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Other / unspecified
Reports whose component NHTSA recorded as unknown, or that do not map to one of the categories above.
From owner reports, verbatim
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
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.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Steering
Reports naming the steering system — racks, columns, power-steering assist and steering linkage.
From owner reports, verbatim
1. What component or system failed or malfunctioned, and is it available for inspection upon request? -The entire electrical system failed and the power steering, SRS, and ABS systems malfunctioned. Yes, it’s available for inspection. 2. How was your safety or the safety of others put at risk? -Last night around 9 pm CST we crank the car and started to drive, (no warning light at that time) and all of a sudden the car had a warning message to start the engine or the vehicle would turn off the engine although we were already driving. The car started to show all the lights and the brakes got harder to press while we were driving about 40 miles per hour. We couldn’t stop completely at the traffic light and the SRS light came on in the dashboard. After we got off the main road, the power steering locked up as we were trying to turn into a parking lot to safely park. Even after removing the key, the engine remained on and the headlights. 3. Has the problem been reproduced or confirmed by a dealer or independent service center? -No, a dealer has not confirmed electrical problems for this specific VIN, although there has been a “blanket recall” on the models in this class. 4. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? -No, not to my knowledge. 5. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? -The battery light turned on around 9 am when I was driving my son to his appointment. Then the light went off. Later on in the day, I was able to drive approximately 30-40 miles before going home. In the evening, when driving to the grocery store, the battery light came back on and went off. After leaving grocery store, this is when the car malfunctioned. The ABS and SRS were prominent during the malfunction.
Steering column is stuck tilted in upmost highest position and will not adjust down lower.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Powertrain (other)
Powertrain reports that are not specifically the engine or transmission — driveshafts, axles, transfer cases and differentials.
From owner reports, verbatim
Vehicle is a 4 wheel drive SUV, having the Mercedes-Benz "4Matic" drivetrain, has it's Center Differential Planetary Gearset (With Integral Clutch Pack) in failure. Mercedes is clearly aware that this is a drivetrain component that fails prematurely as there is a Technical Service Bulletin (LI28.00-P-051499) that provides methodology for diagnosing the failure for 4Matic equipped vehicles from 2003 to 2016, specifically listing 83 different 4Matic equipped vehicles. Particular caution is called out as to special lubrication required prior to assembling the component into the drive train. Very likely that the root cause of the widespread failures was the part not being installed correctly. Though the failure evidences initially by front wheel vibrations and shuddering at low speed, it is a latent serious safety issue in that the component could fail catastrophically when stressed, i.e., hard acceleration when merging onto a highway, at best causing a sudden imbalance in front/rear propulsion resulting in an affected vehicle compromised in its steering, or at worst locking up front or rear wheels resulting in a spin out. Mercedes has replaced this equipment under warranty for an unknown number of vehicles, but refuses to acknowledge how widespread the problem is. Mercedes Customer Assistance says "no recall' so refuses to address the issue and flatly told me to take it up with the NHTSA. Public safety dictates that all affected vehicles need to be inspected for the failure and these defective components replaced as a recall.
THE VEHICLE WILL NOT ENGAGE IN D OR R MODE. UNABLE TO DRIVE. ERROR MESSAGE IN COMBI DISPLAY = "SERVICE REQUIRED, DO NOT SHIFT GEARS, VISIT DEALER". THE CAR WAS ALREADY THREE TIMES AT THE MERCEDES DEALER & REPAIR SHOP FOR THE EXACT SAME PROBLEM, THIS IS THE FOURTH INCIDENT.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Suspension
Reports naming suspension components — springs, struts, shocks, control arms and related hardware.
From owner reports, verbatim
The contact owns a 2014 Mercedes-Benz GLK350. The contact stated that after reversing out of the garage, there was a large rust puddle near the rear passenger’s side of the vehicle. While the contact's wife was driving at an undisclosed speed, the vehicle made an abnormally loud clunking sound. The driver returned to the residence, and the contact also noticed the clunking sound as the driver was pulling into the driveway. Upon inspection, the contact discovered that the rear coil spring had fractured in half. The vehicle was towed to a dealer, where it was determined that the fractured rear coil spring had damaged the shock absorbers and other components. The vehicle was not repaired. The manufacturer was notified of the failure and offered to schedule an appointment. The failure mileage was approximately 82,000. The VIN was unavailable.
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
Too few reports in this category for a page of its own — they appear in the full complaint list.
Driver assistance
Reports naming forward-collision avoidance, lane keeping, back-over prevention, cruise control and related electronic driver-assistance systems.
From owner reports, verbatim
TL* THE CONTACT OWNS A 2014 MERCEDES-BENZ GLK350. THE CONTACT STATED THAT A WARNING LIGHT INDICATED A DANGER OF THE VEHICLE ROLLING OVER. THE CONTACT APPLIED THE ACCELERATOR PEDAL WHILE IN REVERSE, BUT IT DID NOT RESPOND AND THE WARNING LIGHT FLASHED. SUDDENLY, THE VEHICLE REVERSED AND CRASHED INTO THE GARAGE AND A POLE. THE VEHICLE WAS STUCK SIDEWAYS. A FLATBED TOW TRUCK WAS USED TO MOVE THE VEHICLE AND THE INSURANCE COMPANY REPAIRED THE BODY DAMAGE. THERE WERE NO INJURIES AND A POLICE REPORT WAS NOT FILED. THE VEHICLE WAS TAKEN TO A DEALER FOR FURTHER INSPECTION. THE APPROXIMATE FAILURE MILEAGE WAS 12,000.
TL* THE CONTACT OWNS A 2014 MERCEDES BENZ GLK350. THE CONTACT STATED THAT WHILE PARKING, THE VEHICLE SUDDENLY ACCELERATED WITHOUT ANY WARNING AND CRASHED INTO ANOTHER VEHICLE. THE CONTACT MENTIONED THAT SHE ENGAGED THE BRAKES BUT IT FAILED TO STOP THE VEHICLE. A POLICE REPORT WAS NOT FILED AND NO INJURIES WERE REPORTED. THE VEHICLE WAS NOT TAKEN TO THE DEALER. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE AND CURRENT MILEAGE WAS 8,200.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Interior & seats
Reports naming seats, latches, locks, linkages and interior fittings.
From owner reports, verbatim
On 1/17/25, I was on my commute to my office when I noted a very strong and unpleasant odor. Thinking it was from a truck in front of me, I passed the truck, cracked my passenger window and continued the short distance to my office. After work, when I returned to my car, I noted a hole burned through my driver's side leather seat. I didn't make the connection to the odor from that morning until I arrived home and did some online research. It turns out that my front seat warmer had malfunctioned, burning all the way through the leather. This problem is well documented online in various forums in my year, make and model. In some cases I read about, driver's clothing burned. In one case I found, a child was burned. This is also a well documented problem that occurred in earlier models of Mercedes, resulting in a lawsuit and a recall. My car is currently at the dealer for repair of the faulty seat warmer, replacement of the burned foam cushion, and replacement of the leather seat cover. This could have been so much worse had I been earlier in my commute, or on a highway where I could not have pulled over. It seems like this problem should prompt a recall.
On January 01, 2025, I started my wife's car after adding coolant. I just want to warm it up since we did not use it in a couple of days. I activated the heated seat on the driver side where I was seated and was just looking at the dashboard. I felt something on back right side and thought that there was an insect bite. When I turned and look, I discovered a dime size red small flame and smoke on the seat and realized that it is possibly and part of the heated seat heating element that burned through the seat material and burned my sweater a little bit. I turned off the heated seat immediately and shut off the car and made sure the burning stop or was out. I was thankful that this happen while I was just warming out the car and stationary and that it did not happen while my wife was driving the car. This could have produced a dangerous situation, a bigger fire while driving and could have cause an accident. I called the Mercedes Benz service department which was possibly closed but I got a call back the following day and they said that there is no open recall on this vehicle on anything. I ask what is my option and the answer was to get it checked at the service dept. and that it would cost $351.00 just to find out what was wrong with it. I schedule service for Jan 14, 2025 at 3:30 pm. No police or insurance inspection was done. There has been no warning lamp or message to warn me of the problem. Jan 01, 2025 is the first time it happened. I told my wife not to use the heated seat and put a note on the car to inform anyone that will be in the car even though it is just my wife and I that drives the car.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Seat belts
Reports naming seat belts, buckles, retractors and pretensioners.
From owner reports, verbatim
The contact owns a 2014 Mercedes-Benz GLK350. The contact stated while the vehicle was having the yearly inspection, the contact was notified that the second-row seat belt buckle was not releasing as needed. The dealer was contacted and stated that the vehicle needed to be diagnosed. The manufacturer was not contacted. The failure mileage was 60,000.
A MESSAGE APPEARS WITH SEATBELT AND AIR BAG FRONT LEFT MALFUNCTION SERVICE REQUIRED DEALER SAID THERE IS A SENSOR IN SEATBELT TREGERRING THIS MESSAGE.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Heating & air conditioning
Reports naming the heating, ventilation and air-conditioning system.
From owner reports, verbatim
The contact owns a 2014 Mercedes Benz GLK. The contact stated he heating element burned through the front driver side seat. The vehicle was taken to the dealer where it was diagnosed with an internal fault in the driver seat back heater; however the vehicle was not repaired. The manufacturer was notified of the issue. The approximate failure mileage was 120,000.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Tires & wheels
Reports naming tires, wheels, hubs, or the tire-pressure monitoring system.
From owner reports, verbatim
The contact owns a 2014 Mercedes-Benz GLK350. The contact stated that there was an abnormal fuel odor inside and outside vehicle. The check engine, TPMS, and several other unknown warning lights were illuminated. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 100,000.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.
Elsewhere on this vehicle
Data sources
- NHTSA Office of Defects Investigation — owner-reported complaints and the components recorded on them
Data on this page last refreshed .