2021 Mercedes-Benz AMG GT Parking Assist Inoperative TSB
Mercedes-Benz TSB L154.65-P-080132 addresses parking assist issues in the 2021 AMG GT, including 'Active Parking and Parking Assist Inoperative' messages, unexpected park sensor activations, and red rings around the vehicle. This guide helps diagnose these complex parking system malfunctions.

Mercedes-Benz has released Technical Service Bulletin (TSB) L154.65-P-080132, version 3, dated February 12, 2026, to provide a diagnostic guide for various parking system issues. This TSB is particularly relevant for 2021 Mercedes-Benz AMG GT vehicles equipped with PARK213, PARK213M, or PARK223 control units that may experience a Mercedes-Benz parking assist inoperative condition. The bulletin was updated to include information from L154.71-P-080236.
The bulletin aims to assist technicians in diagnosing and resolving complaints related to the parking system, which can manifest in several ways, often leading to a Mercedes-Benz parking assist inoperative message or other visual and acoustic warnings. This guide is crucial for addressing complex parking system malfunctions.
Symptoms
Owners of affected 2021 Mercedes-Benz AMG GT models may observe a range of symptoms indicating a problem with the parking assistance system. These include:
- One or More PARK Sensor Activations: Sensors may activate without any obvious cause or obstruction, leading to unexpected warnings.
- Red Ring Around Vehicle: A visual
Frequently Asked Questions
- What is TSB L154.65-P-080132 about?
- TSB L154.65-P-080132 is a Mercedes-Benz diagnostic guide for parking system malfunctions, including conditions where the parking assist is inoperative, sensors activate without cause, or a red ring appears around the vehicle. It also incorporates information from TSB L154.71-P-080236.
- What are the common symptoms of a Mercedes-Benz parking assist inoperative issue?
- Common symptoms include the message 'Active Parking and Parking Assist Inoperative' on the instrument cluster, unexpected park sensor activations, a 'Red Ring Around Vehicle' display, a 'White Park Message on Instrument Cluster', and various PARKTRONIC display or acoustic warning malfunctions such as 'Malfunction of displays > Front left display' or 'Acoustic warning malfunction > General'.
- Which Mercedes-Benz models are affected by this parking assist TSB?
- This TSB specifically applies to 2021 Mercedes-Benz AMG GT vehicles equipped with PARK213, PARK213M, or PARK223 parking assist control units. These control units are central to the vehicle's parking assistance functionality.
- How is the 'Active Parking and Parking Assist Inoperative' message resolved?
- Resolution for the 'Active Parking and Parking Assist Inoperative' message and other related parking system faults requires a trained Mercedes-Benz technician to consult the detailed 'Park System Diagnostic Guide 213_213M_223.pdf' referenced in TSB L154.65-P-080132. This guide provides the necessary steps to identify and address the specific root cause of the malfunction.
- What should owners know about the diagnostic process for these parking system issues?
- Owners should be aware that diagnosing these issues requires specialized knowledge and Mercedes-Benz approved tools. The TSB explicitly states that the information is for trained professionals and does not guarantee warranty coverage, nor does it imply a defect in all vehicles. Multiple root causes can lead to similar symptoms, necessitating a thorough, case-by-case diagnosis by a dealership.
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