2023 MERCEDES-BENZ GLS 450 Complaints and Recall Information
The 2023 MERCEDES-BENZ GLS 450 has 2 complaints and 44 recalls filed with NHTSA. Owners most frequently report sudden, unintended braking on the highway accompanied by automatic seat belt tightening. The braking occurs without audible alerts or dashboard warnings, lasting 1 to 3 seconds, and causes instability. One owner noted the issue persisted even after disabling the automatic braking system.
Common Issues- Unexpected braking. Vehicle suddenly brakes for 1 to 3 seconds on the highway without alerts, affecting stability and feeling like rear brakes activate before front brakes.
- Seat belt tightening. The seat belts automatically tighten during the sudden braking events, contributing to safety concerns for occupants.
There are 44 recalls affecting the 2023 GLS 450 involving various systems including powertrain software, electrical wiring, fuel delivery, and body components. These recalls address defects that can cause engine stalls, fire risks, fuel pump failures, and loose exterior parts.
Recalls- Transmission control module. (NHTSA 24V118000) Around 105,071 vehicles affected. The transmission may not downshift fully, causing engine stalls that increase crash risk. Dealers will update software free of charge.
- Electrical wiring ground connection. (NHTSA 24V207000) Approximately 116,020 vehicles affected. A 48-Volt ground under the passenger seat may overheat due to a loose connection, increasing fire risk. Dealers will inspect and tighten the connection at no cost.
- Fuel pump shutdown. (NHTSA 23V445000) About 143,551 vehicles affected. The fuel pump can shut off, resulting in loss of drive power and increased crash risk. Dealers will replace the fuel pump for free.
- Rear door window trim bars. (NHTSA 23V178000) Approximately 70,225 vehicles affected. The rear window trim bars may detach while driving, creating road hazards and potential crash or injury risks. Dealers will inspect and secure trim bars at no charge.
- Fuel pump shutdown expansion. (NHTSA 23V880000) Near 79,676 vehicles affected. This recall expands on previous fuel pump issues causing loss of drive power and crash risk. Replacement fuel pumps will be installed free of charge.
Owners dealing with repeated safety-related repairs, unresolved recall remedies, or recurring defects might have rights under their state’s lemon law. Consulting with a legal professional can provide guidance based on specific circumstances.
2023 MERCEDES-BENZ GLS 450 Summary
2023
Model Year
2
Total Complaints
5
Total Recalls
514543
Vehicles Affected
Recalls
2023 MERCEDES-BENZ GLS 450
116020 vehicles affected
ELECTRICAL SYSTEM:WIRING
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2023-2024 GLE 350, 2020-2024 GLE 450, 2020-2023 GLS 580, GLE 580, 2019-2023 GLS 450, 2021-2023 Maybach GLS 600, AMG GLS 63, 2021-2024 AMG GLE 53, AMG GLE 53 Coupe, and AMG GLE 63 S vehicles. A 48-Volt ground connection under the passenger seat may not be secured properly, resulting in the ground connection overheating.
Risk: An overheated ground connection can increase the risk of a fire.
2023 MERCEDES-BENZ GLS 450
105071 vehicles affected
POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2020-2023 GLE 450 and GLS 450 vehicles. The transmission may not fully downshift in certain conditions, causing the engine to stall.
Risk: An engine stall increases the risk of a crash.
2023 MERCEDES-BENZ GLS 450
70225 vehicles affected
STRUCTURE:BODY
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2022-2023 GLE350, GLE450, GLE580, GLS450, GLS580, Maybach GLS600, AMG GLE53, AMG GLE63 S, and AMG GLS63 vehicles. The rear door window trim bars may detach from the vehicle while driving.
Risk: Detached trim bars may cause a road hazard and increase the risk of a crash or injury.
2023 MERCEDES-BENZ GLS 450
143551 vehicles affected
FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021-2023 C-Class, E-Class, S-Class, CLS, SL, GT, GLC, GLE, GLS, and G-Class vehicles. Please refer to MBUSA's recall report for specific vehicle details. The fuel pump may shutdown, which can result in a loss of drive power.
Risk: A loss of drive power can increase the risk of a crash.
2023 MERCEDES-BENZ GLS 450
79676 vehicles affected
FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021-2024 GLE, GLS, C-Class, E-Class, S-Class, SL, GLC, CLS, AMG GT, and G-Class vehicles. Please refer to MBUSA's recall report for specific vehicle details. The fuel pump may shutdown, causing a loss of drive power.
Risk: A loss of drive power can increase the risk of a crash.
Complaints
2023 MERCEDES-BENZ GLS 450
ID: 2082233FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
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.
2023 MERCEDES-BENZ GLS 450
ID: 2082232SERVICE BRAKES
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.