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2021 Mercedes-Benz AMG Glc63 problems

The most common problem on the 2021 Mercedes-Benz AMG Glc63 is electrical system. Its complaint count is close to a typical AMG Glc63 model year.

Typical yearClose to a typical year
Owner complaints
2
Recalls
6
Service bulletins
2014 warranty
Worst area
Electrical

The worst 2021 Mercedes-Benz AMG Glc63 problems

Ranked by number of owner complaints. Mileage and cost come from what owners wrote.

  • Electrical
    1
  • Engine
    1
  • Suspension
    1
  • Transmission
    1

Problems by type

Tap a problem to see which part fails, at what mileage and in which other years.

  • Electrical
    1
  • Engine
    1
  • Suspension
    1
  • Transmission
    1

Recalls 6

Fuel system, gasoline: delivery: fuel pumpReported June 26, 2023 · 143,551 vehicles affected
What is wrong
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.
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.

Recall number 23V445000 · Recall details

Electrical system: softwareReported May 20, 2022 · 242,722 vehicles affected
What is wrong
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.
Risk
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.

Recall number 22V365000 · Recall details

Exterior lighting: headlightsReported April 15, 2022 · 129 vehicles affected
What is wrong
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021 GLC 300, GLC 300 4Matic, AMG GLC 63 4Matic, AMG GLC 63 S 4Matic, and AMG GLC 43 4Matic vehicles. The electrical connection for the headlights may not be watertight, which can result in headlight failure.
Risk
Headlight failure can decrease visibility for both the driver and surrounding traffic, increasing the risk of a crash.
Remedy
Dealers will inspect and replace the headlight sealing plugs, as necessary, free of charge. Owner notification letters were mailed June 3, 2022. Owners may contact MBUSA customer service at 1‑800‑367‑6372. MBUSA's number for this recall is 2022050005.

Recall number 22V261000 · Recall details

Back over prevention: sensing system: cameraReported May 14, 2021 · 343,191 vehicles affected
What is wrong
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."
Risk
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.

Recall number 21V354000 · Recall details

Seat belts: pretensionerReported April 1, 2021 · 8,634 vehicles affected
What is wrong
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021 C-Class, E-Class, E-Class Coupe and Convertible, GLC, CLS, AMG GT 4-door Coupe and G-Class vehicles. Please refer to MBUSA's recall report for specific vehicle model details. A faulty electrical contact within the seat position switch may prevent the driver and passenger air bags and seat belt force limiters from properly activating during a crash.
Risk
Air bags and seat belts that do not perform properly in a crash can increase the risk of injury.
Remedy
MBUSA will notify owners, and dealers will replace the seat position switches, free of charge. Owner letters were mailed May 21, 2021. Owners may contact MBUSA customer service at 1‑800‑367‑6372. MBUSA's number for this recall is 2021040016.

Recall number 21V230000 · Recall details

Electrical system: softwareReported February 5, 2021 · 1,292,258 vehicles affected
What is wrong
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.
Risk
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.

Recall number 21V058000 · Recall details

See all 6 recalls for the 2021 Mercedes-Benz AMG Glc63

Technical service bulletins for the 2021 Mercedes-Benz AMG Glc63 201

Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.

See all 201 bulletins for the 2021 Mercedes-Benz AMG Glc63

What 2021 Mercedes-Benz AMG Glc63 owners say

Most recent owner complaints, unedited.

Filed Mar 18, 2026 · Engine, Suspension · MI

This 2021 Mercedes-Benz GLC 63 AMG has experienced repeated and escalating warranty defects involving engine performance, loss of acceleration, air suspension failure, and now inoperative advanced safety systems including blind spot and active brake assist. Despite numerous repair attempts at authorized dealerships, including extensive engine teardown and cylinder head replacement, the manufacturer has been unable to permanently repair the vehicle. The car has been out of service for 145 cumulative days to date and continues to exhibit safety-related failures. It is currently back at the dealership for service. The vehicle therefore qualifies as a lemon and the owner seeks statutory relief in the form of a buyback and compensation. Please see the attached invoices for additional details and timeline below. Service Repair Timeline 2023 ● Air suspension diagnostics & component replacement Dec 5, 2023 (1 day) Invoice #160689 2024 ● Loss of acceleration ● Vehicle enters limp mode ● Fuel pressure sensor replaced ● Multi-day service hold ● Recurrent suspension malfunction ● "Do not drive over 50 mph" warnings ● Valve block / fuse / compressor diagnostics ● Check Engine Light ● Rough running ● Misfire cylinder 2 ● Ignition coils, plugs, injector replaced ● Vehicle held for extended diagnostics ● Compression loss discovered ● Valve seat damage ● Cylinder head removal & replacement ● Extensive engine teardown ● Vehicle out of service 103 consecutive days March 22, 2024-March 29, 2024 (8 days) Invoice #162719 March 29, 2024-April 11, 2024 (14 days) Invoice #162840 April 28, 2024-May 1, 2024 (4 days) Invoice #163306 May 2, 2024-August 12, 2024 (103 days) Invoice #289050 August 21, 2024-August 30, 2024 (8 days) Invoice #292684 August 28, 2024 (1 day) Invoice #292920 October 8, 2024 (1 day) 2026 ● Recurrent warnings ● Check Engine Light ● Blind Spot Assist inoperative ● Active Brake Assist limited ● Recurrent suspension malfunction (3rd time) ● "Do not drive over 50 mph" warning

Filed Nov 6, 2025 · Electrical · 65,000 miles · TX

The contact owns a 2021 Mercedes-Benz AMG GLC63. The vehicle was taken to the local dealer for routine maintenance, and the contact was informed that there was an issue with the ignition coil. There was a misfire coming from the engine. The dealer determined that the ignition coil needed to be replaced. The vehicle was not repaired. Upon investigation, the contact linked the failure to Technical Service Bulletin: 2021070006. The manufacturer was contacted and referred the contact to the federal safety agency Hotline for assistance. The failure mileage was approximately 65,000.

Compare the 2021 Mercedes-Benz AMG Glc63

Other model years

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Questions about the 2021 Mercedes-Benz AMG Glc63

Is the 2021 Mercedes-Benz AMG Glc63 reliable?

Owners have filed 2 complaints about the 2021 Mercedes-Benz AMG Glc63, close to a typical AMG Glc63 model year.

What is the most common problem with the 2021 Mercedes-Benz AMG Glc63?

Electrical system, with 1 complaint. Next is engine (1).

How many recalls does the 2021 Mercedes-Benz AMG Glc63 have?

6 recalls, covering fuel system, gasoline, electrical system and exterior lighting.

Was there a recall on the 2021 Mercedes-Benz AMG Glc63 electrical?

Yes, 2 recalls: 22V365000, 21V058000. Check your VIN to see if your car still needs the free repair.

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