2021 Mercedes-Benz AMG GT Parking System Fault TSB

Mercedes-Benz has issued Technical Service Bulletin (TSB) L154.65-P-080132, version 2, dated January 29, 2026, to address various parking system issues in vehicles equipped with PARK213, PARK213M, and PARK223 control units. This TSB, titled "Parking Systems Diagnostic Guide," provides guidance for diagnosing conditions such as a "Red Ring Around Vehicle" display, unexpected park sensor activations, and specific warning messages on the instrument cluster. The primary focus of this bulletin is to assist technicians in troubleshooting the Mercedes-Benz AMG GT parking system fault.

Symptoms

Owners of affected vehicles may observe several indicators of a parking system malfunction. These include:

• A visual "Red Ring Around Vehicle" display.
• Unintended or "One or More PARK Sensor Activations" without an obvious obstacle.
• A "White Park Message on Instrument Cluster."
• A critical warning message on the instrument cluster stating, "Active Parking and Parking Assist Inoperative."

Beyond these direct messages, technicians are guided to investigate specific diagnostic symptom paths related to the PARKTRONIC system:

• Malfunction of displays, specifically the front left display.
• General acoustic warning malfunction.
• Automatic shutoff of the parking assist function.
• General malfunction of displays.
• Simultaneous malfunction of all displays.
• Malfunction of displays operating without obvious cause.
• Acoustic warning malfunction operating without obvious cause.

Affected Control Units

This diagnostic guide is specifically applicable to vehicles utilizing the PARK213, PARK213M, and PARK223 control units. These units are integral to the vehicle's parking assist and PARKTRONIC systems, and issues within them can lead to the observed symptoms.

Cause

The TSB indicates that the Mercedes-Benz AMG GT parking system fault can arise from various root causes. The bulletin itself does not specify individual causes but directs technicians to a comprehensive diagnostic guide for detailed troubleshooting.

Diagnosis and Remedy

To address the parking system issues, Mercedes-Benz refers technicians to an attached diagnostic guide titled "Park System Diagnostic Guide 213_213M_223.pdf." This external document contains the detailed steps and procedures necessary for proper diagnosis and repair. The TSB serves as an overview, directing service personnel to the comprehensive instructions for resolving the Mercedes-Benz AMG GT parking system fault.

Owner Action

If you experience any of the described symptoms related to your 2021 Mercedes-Benz AMG GT parking system, it is recommended to schedule an appointment with an authorized Mercedes-Benz service center. Technicians will utilize TSB L154.65-P-080132 and the associated diagnostic guide to accurately diagnose the underlying cause and perform the necessary repairs.

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NHTSA ID: 11027904