2015 Mercedes-Benz GL-Class owner complaints

Second row head rest does not adjust to different positions making it unsafe for children.

Tl* the contact owns a 2015 Mercedes benz gl450. The contact stated that the headrest prevented the contact from properly installing a child safety seat in the rear of the vehicle. The contact mentioned that the headrest could only be removed by the dealer. The vehicle was taken to the dealer, but was not diagnosed or repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 2,000.

My car has an ongoing problem with the HVAC system. It generates a mold and mildew smell while using the ac and heat. Mercedes says they no of this issue but have no permanent fix. The smell is so bad that it is almost un-drivable. Mercedes dealerships have bulletins that denote the issue is known, but their work around only temporarily improves the smell. There is an obvious engineering issue with the HVAC system that is unhealthy. There is apparently that forms around the mold around the ac evaporator. Mercedes has an internal alert # tsb li83-30-p-059119. This is not a permanent fix and only improved the smell for 3-4 weeks and took over two days to implement. The smell occurs all the time when either the ac or heater is on. This started at 2200 miles and continues today (I have 17k

The fixed portion of the Panorama Sunroof exploded while driving on the highway at 65mph in light traffic and temperatures were in the mid 40's. Glass shards fell on the passengers, including three young children under the age of 5. Repairs are being arranged by customer pay and insurance. Manufacture denies fault.

On Mercedes GL350, the trunk/ hatch door will not open from outside. It just stopped working. Therefore, I tried to open it from inside, but there is no manual latch inside to open the trunk/ hatch door. It is a safety issue. The dealer, Mercedes Benz of Richmond, 8225 West Broad Street, charged $235 to open the hatch door. The dealership billed total $1322.48 (after 10% discount $1219.66) to replace the latch and its motor. Kindly help the GL350 owner to have latch installed inside open the door in case of emergency.

There are many models of the gl550 ranging from 2012-2015, where the second row driver side seats get stuck in a downward position. Recently it happened to me and another gl550 was in the shop at Mercedes North Houston for repair for the same issue. These are very common in this make and model and something needs to be addressed concerning the matter.

Same issue as recall campaign 2017020016 launch. The latch securing the the center console doors might not meet the requirements of FMVSS 201. The same basic design of the recalled 2017 gls class SUV center console has been in use in other gl and gls models for a number of years.

The contact owns 2015 Mercedes-Benz GL450. The contact stated that the check engine warning light was illuminated. The vehicle was taken to the dealer, where DTC code: P060A00 was retrieved. The dealer determined that the solenoid valve had failed and needed to be replaced. The contact related the failure to TSB Number: 37 13 17 2029027/8. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 119,000.

My 2015 GL550 has 90k miles on it and is city driven, on 09/11/2023 when I was trying to pull out onto a main rd my suv hesitated and the check engine light came on, luckily traffic wasn’t heavy at the time so I wasn’t in any accidents. I called and was able to get my suv into my local Mercedes dealership for an inspection. When the suv was dropped off the check engine light had gone off but when the service center pulled up the codes it showed both turbos were bad and have to be replaced. This isn’t something that should happen to a vehicle that is regularly serviced only at Mercedes service centers, isn’t 10years old yet, never wrecked, and has less then 100k miles on it. If this had happened with heavy traffic or any other situation it could have caused a serious wreck. My suv is curren

To Whom It May Concern: I am writing to formally request the National Highway Traffic Safety Administration’s assistance regarding a critical safety defect in my 2015 Mercedes‑Benz GL 450 (M278 engine). I purchased this vehicle in October 2024 with 76,000 miles, and it now has about 87,000 miles. Alarmingly, I recently received a quote for $13,000 to repair a camshaft failure and extensive electrical damage. I was unaware of these issues when I purchased this car. I bought it under the illusion that it would be a safe vehicle for me and my children. As a single parent and teacher I invested in this vehicle what I could afford and felt I had purchased a safe, reliable vehicle. I am devasted to have a proposal for repairs in excess of $13,000 from a Mercedes dealership who diagnosed the car.

Took to South Bay Mercedes dealer in Torrance because of engine light on. Cause: "Obsolete CDI Control Unit Software" Repair: "Updated to latest software version" Charge: $224.99 because "not covered by Emissions Warranty Extension" Do not understand how Mercedes Benz does not provide a critical software upgrade for free or under a recall? Modifications to the diesel engine and its software done less than a year ago.

My 2015 Mercedes-Benz GL63 AMG has suffered two separate ECU failures caused by oil migrating through the engine wiring harness. The first failure occurred at ~42,600 miles in 2020, and the second at ~59,000 miles in 2023. Both times, the vehicle developed misfires, check-engine warnings, and drivability issues that could have led to stalling at highway speeds. On both occasions, the vehicle has been completely disabled. Repairs required replacement of the wiring harness, ECU, sensors, and fuse box, costing over $5,600. This is a hidden, recurring defect that poses a safety risk and financial burden. The vehicle does not feel safe or reliable to drive, and dealer support and guidance is non-existent. I have been afraid to drive to the point that it has only accumulated 3,000 additional mil

The vehicle misfired while driving on city streets and presented a code for faulty ignition coils. Upon inspection, Mercedes-benz service center found oil in the engine wiring harness rendering the car undriveable.

Tl* the contact owns a 2015 Mercedes-benz gl450. While driving 40 MPH, the vehicle stalled and the pre-safety function limited warning indicator illuminated. The vehicle was pushed over to the side of the road by the contact and passenger. The contact attempted to restart the vehicle, but it failed to start. The vehicle was towed to Mercedes-benz of arcadia (101 n santa anita ave, arcadia, ca 91006, (626) 701-8904) where it was diagnosed that a loose screw was not fastened by the manufacturer and an unknown wire was detached, which caused the vehicle to stall. The vehicle was not repaired. The manufacturer was made aware of the failure and did not assist. The approximate failure mileage was 25,000.

Windshield has cracked on vehicle twice just sitting in the driveway has to be a manufacturer defect.

Gl 450 with VIN [xxx] experienced exact problem defined by NHTSA recall # 18v272 in may 2018 (2 or 3 weeks prior to receiving recall notice from Mercedes-benz usa). Dealership, Mercedes-benz of midlothian virginia, performed repair work required (based urgent need from MIL saying "do not drive vehicle. Mb midlothian repaired the active suspension system by replacing the "sealing cap" on the "acs oil reservoir" - the exact repair specified in the recall. I was charged in excess of $400 for this repair as the dealership "had not yet received official notice that the recall would include (my) vehicle." upon receiving the official recall letter in june 2018, I contacted Mercedes-benz usa. Mb-usa told me that the work I had paid for was, indeed, covered by the recall, and that mb dealership

Tl* the contact owns a 2015 Mercedes benz gl450. While in park, the vehicle started to roll forward as if the vehicle were in drive. The vehicle rolled over a curb and crashed into a tree. The vehicle was driven to the dealer for diagnostic testing, but was not repaired. No injuries were sustained and a police report was not filed. The manufacturer was not notified. The failure mileage was 5,000. The VIN was not available.

As I was driving down the freeway the whole vehicle caught on fire and we got out of the car and within 2-3 minutes while car was burned to ashes.

Tl* the contact owns a 2015 Mercedes-benz gl350. While driving less than 5 MPH, the vehicle suddenly accelerated at a high rate of speed. The contact applied force to the brake pedal, but the vehicle failed to slow down and crashed into a palm tree. There were no injuries and a police report was not filed. The vehicle was towed to a collision center by the insurance company who inspected the vehicle. The manufacturer was notified of the failure and the contact was waiting to determine if they would send a technician to diagnose the failure. The approximate failure mileage was 29,000.