2021 Mercedes-Benz GLS450: complaints, problems and recalls

The contact owns a 2021 Mercedes Benz GLS450. The contact stated while driving 75 mph with the cruise control engaged, the vehicle decelerated to 45 mph than to 15 mph. On another occasion, while driving 80 mph, the vehicle independently decelerated to 45 mph. There was no warning light illuminated. The vehicle was taken to the local dealer however, the mechanic was unable to duplicate the failure. The vehicle was not diagnosed nor repaired. The contact stated that the cruise control and speed assistance feature provided erroneous information. …

Owner-reported narrative. 3,000 miles reported. Look up ODI 11426426 at NHTSA ↗

The car would not start and could not be jumped. I'm told it's the 48V battery has to be replaced. I have seen on the internet numerous people have the same problem and that a large batch of these 48V batteries are the problem. Error message displays stop the vehicle and more details advises battery is malfunctioning and do not continue driving.

Owner-reported narrative. Look up ODI 11442482 at NHTSA ↗

The contact owns a 2021 Mercedes-Benz GLS450. The contact stated that while driving at various speeds, the Lane Departure safety feature independently activated as he attempted to avoid either a person or an object in the lane of traffic. As the contact attempted to steer around the pedestrian or object in the lane of traffic, the safety feature independently jerked the vehicle back into the lane and into the pedestrian or object he attempted to avoid. The contact stated that a RED icon alert would appear on the instrument panel that the vehicl…

Owner-reported narrative. Look up ODI 11455544 at NHTSA ↗

I was driving down the interstate and heard a loud ‘pop’. Very confused, my daughter and I saw a couple pieces of glass fall from the sunroof. Looked up to see the sky and hear the wind. Luckily, I had the shade closed. I pulled over right away to see a big hole in our sunroof. It seems as though this is a problem with Mercedes and they’ve had a recall in the past. When I took it to the dealership, I was told something had to have hit it. That that haven’t had any recalled sunroofs at their location. I definitely would have seen something…

Owner-reported narrative. Look up ODI 11462258 at NHTSA ↗

2021 GLS 450 VIN # [VIN removed] Purch: Nov 26, 2022 UAG Fairfield Auto Group CM, LLC,DBA MERCEDES BENZ OF FAIRFIELD Odometer Date of Purchase 10,084 Odometer Currently *13,700 (onboard notification) TIMELINE: Total vehicle system fails while driving on highway lost engine, steering, power suddenly - stranded. November 27, 2021 Loud interference noise coming from MBUX screen, faulty graphics flashing, app not functioning. Extreme Loud “blower” noise coming from heater. Vehicle start would not work as the vehicle did not recognize key was in…

Owner-reported narrative. 11,000 miles reported. Look up ODI 11465737 at NHTSA ↗

2021 MERCEDES BENZ GLS450. CONSUMER WRITES IN REGARDS TO48-VOLT BATTERY SYSTEM FAILURE. THE CONSUMER STATED THE HAS FAILED TWICE, A YEAR APART. THE DASHBOARD DISPLAYED "48-VOLT BATTERY FAILURE" AND "CHECK ENGINE". THE VEHICLE WOULD FAIL WHILE BEING DRIVEN. THE VEHICLE WAS RESTARTED AND OPERATED AS DESIGNED. THE DEALER WAS UNABLE TO DUPLICATE THE FAILURE. THE CONSUMER STATED THE MANUFACTURER HAD DETERMINED A FIX FOR THE RECALL REPAIR.

Owner-reported narrative. Look up ODI 11469328 at NHTSA ↗

Tire Size 270/50 R 20 Tire type: Cooper Discover SRX These tires came with my 2021 Brand new Mercedes GLS 450. I bought this car in May 2021. I have had this car for only 1 1/2 years with 22K miles; tires thread are down to 0. I have kids, and this is my primary family car. I had a few bad to worst experiences during wet weather conditions. I took my car for my 20K service milestone; My Mercedes dealer acknowledged worn-out tire condition; advised me to purchase new tires. They never informed me about warranty replacement. I just got my tires r…

Owner-reported narrative. Look up ODI 11481970 at NHTSA ↗

Vehicle would not start on 3 separate occasions. The instrument panel indicated it was the 48v battery. Had it towed to Mercedes dealership to have 48v battery replaced.

Owner-reported narrative. Look up ODI 11485772 at NHTSA ↗

Reported: 2020-02-14 (February 14, 2020)

Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2020 CLA250, CLA250 4MATIC and CLA35 AMG 4MATIC, 2020-2021 GLE350, GLE350 4MATIC, GLE450 4MATIC, GLS450 4MATIC and GLS580 4MATIC and 2021 GLE53 AMG Coupe, GLE63S AMG 4MATIC, GLS63 AMG 4MATIC and Maybach GLS600 4MATIC vehicles. The instrument cluster software may deactivate the illumination of certain interior switches (switch bar, overhead control unit, steering wheel) if the hazard lights are turned on and the ignition switch is in the 'off' position. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 101, "Control and Displays."

Consequence: If the interior switches are not illuminated, they may be more difficult to find and operate, increasing the risk of a crash.

Remedy: MBUSA will notify owners, and dealers will update the instrument cluster software, free of charge. The recall began March 31, 2020. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2020030019.

Reported: 2021-02-05 (February 5, 2021)

Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2016 - 2021 CLA-Class, GLA-Class, GLE-Class, GLS-Class, SLC-Class, A-Class, GT-Class, C-Class, E-Class, S-Class, CLS-Class, SL-Class, B-Class, GLB-Class, GLC-Class, and G-Class vehicles. Please refer to the Part 573 report for specific vehicle model details. The software design of the communication module may fail to communicate the correct vehicle location for the emergency call system (eCall) in the event of a crash.

Consequence: Failure of the eCall system may result in emergency responders being dispatched to the wrong location, increasing the risk of injury following a crash.

Remedy: MBUSA will notify owners, and the communication module software will be updated by a dealer, or through an over-the-air (OTA) update, free of charge. The recall began March 12, 2021. Owners may contact MBUSA customer service at 1-877-762-8267. MBUSA's number for this recall is 2021020025.

Reported: 2021-05-14 (May 14, 2021)

Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2019-2021 CLA-Class, GLE/GLS-Class, A-Class, E-Class, E-Class Coupe and Convertible, GLA/GLB-Class, GLC-Class, CLS-Class, and AMG GT-Class 4-door Coupe vehicles. Please refer to MBUSA's recall report for specific vehicle model details. The MBUX multimedia system software may cause the display to remain black, or reboot after startup. This could result in the rearview camera image not displaying properly. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 111, "Rear Visibility."

Consequence: A backup camera that displays a blank image reduces the driver's rear view, increasing the risk of a crash or injury.

Remedy: The multimedia system software will be updated by a dealer, or through an over-the-air (OTA) update, free of charge. Owner notification letters were mailed beginning June 28, 2021. Owners may contact MBUSA customer service at 1-800-367-6373. MBUSA's number for this recall is 2021050012.

Reported: 2021-10-22 (October 22, 2021)

Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2021 GLE 350, GLE 580, GLS 450, GLS 580, AMG GLE 53, AMG GLE 63 S, and AMG GLS 63 S vehicles. The rear window may be insufficiently bonded to the tailgate, which could allow the rear glass to detach.

Consequence: Detached rear glass can become a road hazard, increasing the risk of a crash.

Remedy: Dealers will replace the rear window, free of charge. Owner notification letters were mailed December 8, 2021. Owners may contact MBUSA customer service at 1-800-367-6372.

Reported: 2022-04-08 (April 8, 2022)

Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2020-2022 GLE450, GLS450, 2021-2022 AMG GLE53, 2020-2021 GLE580, GLS580, 2021 AMG GLE63, Maybach GLS600 and AMG GLS63 vehicles. A ground cable bolt for the 48V ground connection under the front passenger seat may not be secured properly, which can cause the electrical cable to overheat.

Consequence: An overheated electrical cable can increase the risk of a fire.

Remedy: Dealers will inspect and tighten the ground cable bolt, as necessary, free of charge. Owner notification letters were mailed July 8, 2022. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2022040017.

Reported: 2022-05-20 (May 20, 2022)

Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2017-2022 CLA-Class, GLA-Class, GLE-Class, GLS-Class, SLC-Class, A-Class, AMG GT-Class, C-Class, E-Class, S-Class, SL-Class, GLC-Class, CLS-Class, GLB-Class, and G-Class vehicles. Please refer to MBUSA's recall report for specific vehicle model details. An error in the communication module's SIM card software can cause a mobile network connection failure, disabling the emergency call (eCall) system.

Consequence: A disabled eCall system would prevent a vehicle occupant from contacting the emergency services call center in an emergency, potentially delaying emergency responders and increasing the risk of injury.

Remedy: The communication module software will be updated through an Over-the-Air (OTA) update or by a dealer, free of charge. Owner notification letters were mailed July 8, 2022. Owner notification letters will be mailed in phases, on July 8, 2022, May 17, 2024, July 29, 2024, and September 27, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's numbers are for this recall is 2022060005 and 2023110006.

Reported: 2022-09-12 (September 12, 2022)

Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2020-2022 GLE350, GLE450, GLS450, 2021-2022 AMG GLE53, 2020-2021 GLE580, GLS580, and 2021 GLE400e, AMG GLS63, AMG GLE63 S, and Maybach GLS600 vehicles. Due to a manufacturing error, the rear door window trim bars may detach.

Consequence: Detached trim bars may cause a road hazard and increase the risk of a crash or injury.

Remedy: Dealers will inspect and secure the rear window trim bars, as necessary, free of charge. Owner notification letters were mailed November 1, 2022. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2022090010.

Reported: 2022-09-30 (September 30, 2022)

Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021 AMG GLS63, 2020-2022 GLS450 and GLS580 vehicles. Due to a manufacturing error, the locks on the third-row seatbacks may fail in the event of a crash.

Consequence: A seat with a seatback lock failure may not properly restrain occupants, increasing the risk of injury during a crash.

Remedy: Dealers will inspect and replace the third-row seatback, as necessary, free of charge. Owner notification letters were mailed November 18, 2022. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2022100011.

Reported: 2023-03-17 (March 17, 2023)

Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2020-2021 GLE350, GLE450, GLS450, GLS580, 2021 AMG GLE53, AMG GLE63, Maybach GLS600, AMG GLS63, and 2020 GLE580 vehicles. The air conditioner drain hoses may have been incorrectly installed, causing water to drain into the passenger compartment.

Consequence: Water intrusion into the foot wells may cause corrosion and/or short circuits to electrical components, increasing the risk of fire. In addition, the emergency call (eCall) feature may be disabled and the doors may not unlock, increasing the risk of injury. Also, the engine may not start or may enter a limp-home mode, increasing the risk of a crash.

Remedy: Dealers will inspect and reinstall the air conditioner drain hoses, as necessary, free of charge. Owner notification letters were mailed April 28, 2023. Owners may contact MBUSA customer service at 1-800-367-6372. This recall is an expansion of recall numbers 21V-288 and 19V-587. MBUSA's numbers for this recall are 2023030014 and 15.

Reported: 2023-06-26 (June 26, 2023)

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.

Consequence: A loss of drive power can increase the risk of a crash.

Remedy: Dealers will replace the fuel pump, free of charge. Owner notification letters were mailed on June 14, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2023070012.

Reported: 2024-02-16 (February 16, 2024)

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.

Consequence: An engine stall increases the risk of a crash.

Remedy: Dealers will update the transmission control unit software, free of charge. Owner notification letters were mailed March 29, 2024. Owners may contact MBUSA customer service at 1-800-367-6372.

Reported: 2024-03-15 (March 15, 2024)

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.

Consequence: An overheated ground connection can increase the risk of a fire.

Remedy: Dealers will inspect and tighten the 48-Volt ground connection as necessary, free of charge. Owner notification letters were mailed on May 3, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2024040002.