2021 Mercedes-Benz AMG GT ECU Software Update

Why This Matters

Mercedes-Benz AG has identified that the engine control unit (ECU) software in certain 2021 Mercedes-Benz AMG GT vehicles may not align with current production specifications. This discrepancy could potentially prevent the vehicle's on-board diagnostics and/or exhaust gas emissions requirements from being fulfilled. Ensuring the ECU software is up-to-date is crucial for proper vehicle operation and compliance.

What the Campaign Addresses

This service campaign, numbered 2024100016 (also referenced as 22P5496210), aims to update the engine control unit software. The campaign affects a total population of 7,572 vehicles, with an initial flagging of 6,098 vehicles and an additional 1,473 vehicles later included. The update ensures that the ECU software, specifically for the N3/10 - Motor electronics ‘MED1775' for combustion engine 'M176' (ME), meets the latest specifications.

How to Check if Your Vehicle is Affected

Mercedes-Benz USA (MBUSA) will conduct this service campaign. Owners of a 2021 Mercedes-Benz AMG GT can determine if their vehicle is affected by contacting an authorized Mercedes-Benz dealer. Dealers can check the Vehicle Master Inquiry (VMI) system to verify if this campaign applies to a specific vehicle's VIN. Initial affected VINs were flagged as "OPEN" in VMI on November 8, 2024, with additional VINs flagged on February 27, 2026.

Important Warnings for Owners

Owners should be aware of specific details regarding this campaign:

• "Please note the campaign will close after the warranty claim has been submitted. This change can take at least one-day to reflect in NetStar VMI."
• If multiple software updates or SCN codings are performed during a single workshop visit, certain operation items (02-4762 and 02-5058) "may be invoiced only on one of the workshop orders."

Repair Procedure Summary

Authorized Mercedes-Benz dealers will perform the ECU software update. The procedure involves connecting the XENTRY Diagnosis system to the vehicle. Technicians will then navigate to the "Quick test view" menu, select "N3/10 - Motor electronics ‘MED1775' for combustion engine 'M176' (ME)," and proceed to "Adaptations" to initiate the "Control unit update" or "Updating of the control unit software." The process requires following the user guidance provided within the XENTRY Diagnosis system. A charger must be used to maintain the vehicle's on-board electrical battery system above 12.5V during the update.

Warranty Information

Mercedes-Benz has provided specific damage codes and operation numbers for warranty claims related to this ECU software update. The following table outlines the applicable codes and estimated labor times:

Damage Code	Operation Number	Description	Labor Time (hrs.)
02-9334		Update Engine Control Unit software (XENTRY Diagnosis connected)	0.1
	02-4762	Connect/disconnect diagnostic system (XENTRY Diagnosis)	0.1
	02-5058	Connect/disconnect starter battery charger (with XENTRY Diagnosis connected)	0.1

It is important to note that operation items 02-4762 and 02-5058 should be invoiced only once per workshop repair order, even if multiple software updates are performed during the same visit. Technicians are advised to check XENTRY Operation Time (XOT) for the most current OP-Code times, as labor times are subject to change.

Owner Action

If you own a 2021 Mercedes-Benz AMG GT, it is recommended to contact your authorized Mercedes-Benz dealer to schedule an appointment for the engine control unit software update. This update will be performed free of charge as part of the service campaign. MBUSA is committed to maintaining vehicle quality and customer satisfaction.

NHTSA ID: 11029055