2024 Mercedes-Benz GLS 450 4matic problems

Filed Oct 31, 2026 · Brakes · NJ

Squeaking Brake Noise

Filed Oct 31, 2026 · Brakes · NJ

Squeaking Brake noise

Filed Aug 26, 2026 · TX

While driving at 60 mph on the highway around 7pm, with no cars infront or next to us, vehicle top glass exploded. No construction. As per other complaints, this has happen to other people. My kidds were in the car and thankfully screen was open otherwise all glass would fall on thdm. As per dealer installer, they already had this part in stock and new eaxctly how to handle it as per his known experiences on such style. But refused to warranty while vehicle under 41000 miles. 2024 GLS450

Filed Jul 6, 2026 · Electrical · MA

While traveling at highway speeds, the digital instrument cluster suffered a sudden, complete power loss and went entirely black for approximately 5 seconds before rebooting. Component failed: Digital instrument cluster / dashboard display. It is available for inspection. Safety risk: Complete loss of critical data (speedometer, vehicle status) at high speed. It caused immediate driver confusion over whether the vehicle had stalled or lost propulsion, creating an acute risk of a high-speed collision in traffic. Reproduced by dealer: [UNKNOWN] Inspected by others: [NO] Prior symptoms: UNKNOWN. There were no warning lamps, messages, or symptoms prior to the sudden blackout.

Filed Jun 9, 2026 · Seats · AZ · 1 injury

[XXX] girl went in back passenger door (rear facing car seat present), crouched under seat area to climb to middle seat when [XXX] brother push button and seat moved forward without stopping crushing [XXX] old head between back of seat and back of Car seat. There was no safety stop, was stuck mother has to press button to move seat back to release head. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed May 10, 2026 · FL

I am submitting a complaint regarding the air conditioning system in my vehicle. The vehicle has a refrigerant (Freon) leak that causes the air conditioning system to stop cooling properly. In addition, there is a loud abnormal noise coming from the AC system while operating. The issue has progressively become worse. The air conditioner either blows warm air or loses cooling performance completely, especially during normal driving conditions. The abnormal noise appears when the AC compressor engages. This defect affects driving comfort and may indicate a failure of the air conditioning components, refrigerant lines, or compressor system. The refrigerant leak also raises concerns about long-term vehicle reliability and safety. The vehicle has been inspected/repaired, but the problem continues to occur.

Filed Apr 24, 2026 · WA

The panoramic sunroof spontaneously shattered. I was driving on highway under open sky and the sun roof just imploded and all the glass came shattering inside all over. There were no extreme weather or any construction or chances of any debris from anything around. No impact object could be identified upon inspection after the car was stopped.

Filed Apr 1, 2026 · Tires · VA · crash

On November 30, 2024, I purchased a new 2024 Mercedes-Benz GLS 450 4MATIC equipped with factory-installed Pirelli tires (size: P 275/45HR21 front; 315/40HR21 rear). At the time of the accident on February 22, 2026, the vehicle had only 15,257 miles. While driving on the interstate in wet conditions, the tires failed to provide adequate traction, causing the vehicle to hydroplane. The loss of traction felt as though the vehicle was driving on ice and was inconsistent with over a year of prior operation in similar weather conditions without issue. The suspected components involved include the Pirelli tires, as well as the Electronic Stability Program (ESP), traction control system, and 4MATIC all-wheel drive system, which did not appear to effectively intervene. The vehicle spun and was involved in a crash, placing myself, my wife, and my child—who has Autism—at significant risk, along with surrounding motorists traveling at interstate speeds. Despite visible tread remaining, the tires did not perform as expected. Based on warranty expectations of approximately 50,000 miles, the apparent performance failure at only 15,257 miles raises serious safety concerns. The vehicle is currently at a collision repair facility and is available for inspection. The issue has not been reproduced, and a manufacturer inspection is pending. The vehicle has been inspected by law enforcement and insurance representatives. There were no warning lights or alerts related to traction, stability, or tire performance prior to the incident. As a result, the vehicle was rendered undrivable, required towing, and has been under repair for over a month, causing significant inconvenience and financial impact. I am requesting a formal investigation and review for appropriate resolution.

Filed Feb 27, 2026 · Driver assistance, Transmission · VA · crash

During interstate travel in rainy conditions, the vehicle appeared to lose traction and hydroplane. The tires appeared to have adequate remaining tread; however, they did not provide expected traction and the vehicle felt as though it was driving on ice. This was inconsistent with my prior experience operating the vehicle for over a year in various weather conditions without encountering similar issues. The Electronic Stability Program (ESP), traction control system, and 4MATIC all-wheel drive system did not appear to intervene to stabilize the vehicle. The vehicle spun and was involved in a crash. Despite the impact, no airbags deployed. The vehicle was rendered undrivable and towed from the scene. It is currently located at a collision repair facility and is available for inspection upon request. The suspected systems involved include the Electronic Stability Program (ESP), traction control system (TCS), 4MATIC all-wheel drive system, and Supplemental Restraint System (SRS/airbags). The vehicle has not yet undergone a full manufacturer engineering inspection, but such a review has been requested. The loss of traction at interstate speed in wet conditions created a serious safety risk to the occupants of the vehicle and surrounding motorists. The apparent lack of stability control intervention and the absence of airbag deployment increased the potential risk of injury. The vehicle was inspected by law enforcement at the scene, towed, and has been reviewed by insurance representatives as part of a claim. A manufacturer inspection is pending based on a defective claim that was filed. There were no warning lights, alerts, or messages related to traction control, stability control, or airbags prior to the incident.

Filed Feb 12, 2026 · Driver assistance, Visibility · TX · crash

The 2024 Mercedes-Benz GLS 450 exhibits a critical "Spatial Mapping Offset" defect within the MBUX 360-degree camera interface and the Active Brake Assist (ABA) logic. Specifically, the digital rendering of physical obstacles on the dashboard display is offset by approximately 0.5 feet (6 inches). This creates a "false clear" condition where the driver is visually signaled that an obstacle has been cleared while the vehicle’s chassis is still in a strike position. On September 27, 2025, this defect resulted in a collision with a stationary post. Despite the system’s Parking Control Module identifying the object (recorded as "Orange/Indented" in dealer Repair Order #731706), the system failed to escalate to a Red Triangle alert or initiate autonomous braking. Furthermore, the vehicle’s sensing suite is demonstrably unstable, exhibiting "Phantom Alerts" (detecting non-existent obstacles) and total Augmented Reality (AR) camera blackouts in direct sunlight—a failure the manufacturer’s representative attributed to solar interference. The manufacturer (MBUSA) has formally denied a defect exists, claiming the system is not designed to detect stationary objects or operate below 4 mph. However, I have documented video/photographic evidence of the vehicle successfully intervening for stationary objects at these speeds in other scenarios (e.g., concrete garage posts). This proves the system's safety protocols are intermittent and unreliable. This lack of synchronization between real-time spatial data and the driver interface makes a collision mathematically inevitable and constitutes a significant public safety hazard.