What causes brake noise in my 2021 Mercedes-Benz AMG GT?

Brake noise in your 2021 Mercedes-Benz AMG GT is typically caused by frictional vibrations, especially in high-performance AMG brake systems. Factors like driving style, brake pressure, and ambient temperatures can contribute to these noises.

What is the repair for Mercedes-Benz AMG GT brake noise?

The repair involves a multi-step process including thorough diagnosis, cleaning brake components, chamfering the edges of brake pads, applying specific adhesive films and Molykote to contact points, and a precise brake bedding procedure. This is outlined in TSB LI42.10-P-063502.

Are there any special instructions for the brake bedding process in my AMG GT?

Yes, a specific brake bedding process is required. It involves driving approximately 30 miles, performing 15 braking cycles from 62 MPH to 30 MPH with moderate pressure, maintaining a 1-mile cooling distance between applications, and then driving 3 miles to allow the system to cool. For AMG P3 Hybrid vehicles, recuperation must be switched off before bedding.

What parts are needed to fix the brake noise in my AMG GT?

The repair may require specific parts such as Alternate Adhesive Transfer Tape (3M F9469PC or A 190 423 32 00) and Molykote (A 001 989 87 51 09). These materials are used to reduce vibrations and ensure proper contact between brake components.

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2021 Mercedes-Benz AMG GT Brake Noise TSB

Mercedes-Benz has issued TSB LI42.10-P-063502 to address brake noise and squealing in 2021 AMG GT vehicles. The bulletin details diagnostic steps, cleaning, chamfering, and a specific brake bedding process to resolve frictional vibrations.

Marcus Weber2021 Mercedes-Benz AMG GTApril 25, 2026

2021 Mercedes-Benz AMG GT — manufacturer_communication document image 1 — Source: NHTSA manufacturer_communication 11021142

LI42.10-P-063502SI 00.00-P-0086ABrake noise on AMG vehiclesNoises/squealing from the service brakeFrictional vibrationsAMG brakesChamfering TechniqueAdhesive and Paste Application AreaRear Pad Grease AreaBrake Bedding Process

Symptoms

Owners of 2021 Mercedes-Benz AMG GT vehicles, equipped with steel or ceramic brakes (code B07), may experience various forms of brake noise or squealing. These noises can occur in different driving situations and under varying ambient conditions.

The reported symptoms, categorized under chassis/suspension and the service brake, include:

General brake system noises
Brake squeals
Whirring or howling sounds from the brakes
Other unspecified brake noises

Cause of Brake Noise

Mercedes-Benz has identified the primary cause of the Mercedes-Benz AMG GT brake noise as frictional vibrations. High-performance AMG brakes are designed for optimal performance under high load, but they can emit noise in certain scenarios. This bulletin was updated to include notes on proper adhesive and copper paste application to address these vibrations.

Factors contributing to these noises include:

Driving style: Aggressive or inconsistent braking habits.
Brake pressure and application style: This includes

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Frequently Asked Questions

What causes brake noise in my 2021 Mercedes-Benz AMG GT?: Brake noise in your 2021 Mercedes-Benz AMG GT is typically caused by frictional vibrations, especially in high-performance AMG brake systems. Factors like driving style, brake pressure, and ambient temperatures can contribute to these noises.
What is the repair for Mercedes-Benz AMG GT brake noise?: The repair involves a multi-step process including thorough diagnosis, cleaning brake components, chamfering the edges of brake pads, applying specific adhesive films and Molykote to contact points, and a precise brake bedding procedure. This is outlined in TSB LI42.10-P-063502.
Are there any special instructions for the brake bedding process in my AMG GT?: Yes, a specific brake bedding process is required. It involves driving approximately 30 miles, performing 15 braking cycles from 62 MPH to 30 MPH with moderate pressure, maintaining a 1-mile cooling distance between applications, and then driving 3 miles to allow the system to cool. For AMG P3 Hybrid vehicles, recuperation must be switched off before bedding.
What parts are needed to fix the brake noise in my AMG GT?: The repair may require specific parts such as Alternate Adhesive Transfer Tape (3M F9469PC or A 190 423 32 00) and Molykote (A 001 989 87 51 09). These materials are used to reduce vibrations and ensure proper contact between brake components.

2021 Mercedes-Benz AMG GT Technical Reference Guide

This Mercedes-Benz technical bulletin LI00.01-P-078887 provides a comprehensive reference for workshops, detailing common acronyms, control unit identification methods, network/wiring architecture groups, and platform-to-baumuster mappings for the 2021 Mercedes-Benz AMG GT.

2021 Mercedes-Benz AMG GT Parking System Malfunctions

This Mercedes-Benz technical service bulletin (TSB) L154.65-P-080132 addresses various parking system malfunctions in the 2021 AMG GT, including sensor activations, a "Red Ring Around Vehicle" warning, and "Active Parking and Parking Assist Inoperative" messages.

2021 Mercedes-Benz AMG GT Headlamp Fogging TSB

Mercedes-Benz issued TSB LI82.10-P-078301 for headlamp and fog lamp fogging in the 2021 AMG GT. This document explains that fogging is a natural phenomenon and provides a procedure to clear condensation, distinguishing it from defects.

2021 Mercedes-Benz AMG GT Parking Assist Faults TSB

This Mercedes-Benz Technical Service Bulletin (TSB) L154.65-P-080132 details various parking assist system faults for the 2021 AMG GT, such as "Red Ring Around Vehicle" and "Active Parking and Parking Assist Inoperative" messages. It provides diagnostic guidance for issues related to PARK sensor…

2021 Mercedes-Benz AMG GT ECU Software Update

Mercedes-Benz has issued service campaign 2024100016 to update the Engine Control Unit (ECU) software on certain 2021 AMG GT vehicles. This update ensures the ECU software meets current production specifications, preventing potential issues with on-board diagnostics and exhaust gas emissions…

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