2023 MERCEDES-BENZ GLS-Class Problems

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Complaints Reported

Complaints by Component

SERVICE BRAKES,FORWARD COLLISION AVOIDANCE

2 complaints

The car recently underwent a software update at the dealership for a backup camera issue. When I was driving home on the highway, the car suddenly braked and the seat belts automatically tightened up. This happened 3 additional times on the highway about 5 days later. I had turned off the automatic braking system and it seemed to go away. Then, with the system off, we experienced this again yesterday while on the highway at 70mph. The braking lasts for 1-3 seconds. There is no audible alert or dashboard display. IT renders the car quite unstable as it feels as though the rear brakes are being activated before the front. I reported this to the dealership and they want to inspect the car.

Apr 14, 2025

There have been 3 incidents where the car responded to unknown stimuli by braking hard. 3 months ago it happened while making a left turn through an intersection, driving about 10 mph the brakes unexpectedly locked up, luckily the person behind me took evasive action and didn't hit me; 2 weeks later it happened again, I was driving on I-45 attempting to pass slower drivers, the brakes dramatically engaged while I was driving over a slight hill, today it happened again when it mistook a vehicle in a different lane of traffic, and performed a hard brake evasive measure even though there was no chance of collision and nothing in front of the vehicle.

Oct 02, 2024

UNKNOWN OR OTHER

1 complaint

AT 0730 on 16 March, 2026 I was traveling northbound on XXX in [XXX] . Temp was 55 degress Farenheight and the wind was in excess of 20 knots. I was going 60 MPH. Suddenly a large "gun shot" sound echoed through the car startling me excessively. I thought the engine had blown up or all the vehicle tires exploded. I was able to gain control of the car and pull into the emergency lane where I quickly deteremined the Panoranmic Sun Roof had exploded and shards of glass where everywhere. There was no warning and this event was tramatic. Could have caused a serious accident. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Mar 16, 2026

STRUCTURE

1 complaint

Rear door window trim on driver's side detached from vehicle while traveling at highway speed.

Jan 09, 2025

SERVICE BRAKES,ENGINE,LANE DEPARTURE

1 complaint

when coming to a stop and applying the break, the transmission stalled. a warning was issued around lane keeping assist and a second warning. Then the transmission light was on. It was not at risk in the moment because no one was behind me and I was coming to a stop sign. If it prevented me from stopping I might have gone through the stop sign It is at the dealership today to service. no warning lamps, messages or other symptoms.

Aug 21, 2024

FUEL SYSTEM, GASOLINE

1 complaint

The contact owns a 2023 Mercedes-Benz GLS450. The contact received notification of NHTSA Campaign Number: 23V880000 (Fuel System Gasoline) however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact stated while driving approximately 10 MPH and making a left turn, the vehicle stalled. The contact stated that an unknown warning was illuminated; however, when the vehicle was restarted, the warning light was off. The vehicle was taken to a dealer who was unable to duplicate the failure. The vehicle was not repaired. The contact stated that the failure reoccurred after receiving the recall notification. The failure mileage was approximately 11,000. Parts distribution disconnect.

Jul 24, 2024

POWER TRAIN,ELECTRICAL SYSTEM,ENGINE

1 complaint

Car just stopped abruptly on highway. We tried to shut off and restart. Nothing worked. All emergency signs showed up on dashboard. Highway road assistance guy tried to put it in neutral..it did nit work. We were scared to death siting on i 278 with trucks,buses coming behind us. Car just abruptly stopped

Jul 09, 2024

ENGINE,FUEL/PROPULSION SYSTEM

1 complaint

Twice the vehicle has stalled while driving. I see that there is a recall on my model for a faulty fuel pump which causes this problem, but my dealer claims my vehicle is not part of the recall even though it is having the same issue.

Oct 04, 2023

ELECTRICAL SYSTEM,ENGINE

1 complaint

I have a new GLS450 and on two separate occasions the car has shut down at a stop with no warning. First time was approximately mid July of 2023 with about 1,700miles. While at a stop the instrument panel displayed a text box with the words “Malfunction” across the screen, and proceeded to shut down. After a minute we were able to restart the car. Took it back to the dealership and they were not able to get any codes or reason why it happened. Now 3 weeks later it happened again, and back at the same dealership from where I purchased it. Again, same story that they are not able to get any codes as to what malfunctioned.

Aug 09, 2023

WHEELS,UNKNOWN OR OTHER,SERVICE BRAKES

1 complaint

This is [XXX], a Mercedes customer who purchased a brand new 2023 GLS 450 (VIN:[XXX] ) in April 2023 from the Mercedes dealer in White Plains NY. I am contacting you about the Mercedes rusting claim. On May 22, 2023, less than a month after the purchase, a sheer of orange powdery rust was discovered (video available) on all steel frames of the four wheels. I contacted the sales person ([XXX]) , who referred to a manager ([XXX]) who told me that it was “normal because every car in our parking lot has the same thing.” I was very unhappy and disappointed with the response. The rusting obviously is a defect which is not normal. It is potentially dangerous and deadly for customers. INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

May 25, 2023

4.4/5.0

87 reviews

MERCEDES-BENZ GLS-Class VIN Decoder — Free VIN Check Video Guide

Watch our quick MERCEDES-BENZ GLS-Class VIN decoder walkthrough. Learn how to decode any MERCEDES-BENZ GLS-Class VIN number to get full vehicle history, recall alerts, specifications, fuel economy (MPG), safety ratings, and known problems — completely free on ForCar.org.

Where to Find VIN for Problems Check

To check for problems and complaints on your 2023 MERCEDES-BENZ GLS-Class, you'll need the VIN number. Find your VIN in one of these 4 common locations.

Where to Find VIN Number on 2023 MERCEDES-BENZ GLS-Class for Problems Lookup - Dashboard, Door Jamb, Engine Bay, Documents

Understanding VIN Structure for Problem Reports

Each character in your 2023 MERCEDES-BENZ GLS-Class 17-digit VIN helps identify specific complaints and problems affecting your vehicle model.

2023 MERCEDES-BENZ GLS-Class VIN Structure for Complaint Verification - WMI, VDS, Check Digit, Model Year, Plant Code

How to Check 2023 MERCEDES-BENZ GLS-Class Problems in 3 Steps

Locate Your VIN

Find the 17-character VIN on your 2023 MERCEDES-BENZ GLS-Class dashboard (visible through windshield), door jamb, engine bay, or vehicle documents.

Review by Component

Browse owner-reported complaints organized by vehicle component (engine, transmission, brakes, electrical) to identify common issues and problem patterns for this model year.

Check Safety Issues

Review crash and fire incidents for each component to assess safety concerns. Contact your MERCEDES-BENZ dealer or report problems to NHTSA at SaferCar.gov.

Frequently Asked Questions

How many problems does the 2023 MERCEDES-BENZ GLS-Class have?

The 2023 MERCEDES-BENZ GLS-Class currently has 10 owner-reported complaints according to NHTSA database. These complaints are organized by component to help identify common issues.

What are the most common problems with 2023 MERCEDES-BENZ GLS-Class?

The most common problems reported for the 2023 MERCEDES-BENZ GLS-Class are organized by component above. Each component section shows owner-reported issues, crash reports, and fire incidents to help identify patterns and problem areas.

Where does this 2023 MERCEDES-BENZ GLS-Class problem data come from?

All problem and complaint data for the 2023 MERCEDES-BENZ GLS-Class comes directly from the National Highway Traffic Safety Administration (NHTSA) database. These are real complaints submitted by actual vehicle owners.

How do I report problems with my 2023 MERCEDES-BENZ GLS-Class?

You can report safety problems with your 2023 MERCEDES-BENZ GLS-Class directly to NHTSA at SaferCar.gov or call 1-888-327-4236. Your complaint helps identify patterns and may lead to recalls or investigations.

Where can I find my VIN to check problems?

Your 2023 MERCEDES-BENZ GLS-Class VIN is located in 4 places: (1) Dashboard near windshield on driver's side, (2) Driver's door jamb sticker, (3) Engine bay, (4) Vehicle registration and insurance documents.

Is the 2023 MERCEDES-BENZ GLS-Class reliable?

Reliability can be assessed by reviewing the number and severity of owner complaints for the 2023 MERCEDES-BENZ GLS-Class. Check complaints by component, crash reports, and fire incidents above to evaluate potential issues and problem patterns.