Service bulletins for the 2023 Mercedes-Benz AMG GT
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
185 on file from NHTSA, as of 2026-10-19.
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Only bulletins with component: Engine are shown. Show all
| LI20.40-P-078593 | 2024-11-22. Service bulletin. ENGINE. Complaint Engine cooling fan running for an extended time after switching off vehicle. Cause Optimized thermal management in latest PTCU software. Remedy This is a normal function in the latest PTCU software. Engine fan will operate for up to 20 minutes after ignition is switched off. Note: Repair work should only be performed if a clear malfunction is identified |
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| LI15.40-P-077947 | 2024-10-18. Service bulletin. ELECTRICAL SYSTEM; ENGINE. Complaint Combustion engine could no longer be started, only electric driving possible. Cause High-voltage belt-driven starter-alternator faulty. Remedy Requirement: Prior to the implementation of the test work, it must be ensured that the person carrying out this work has successfully completed the required HV qualification to work on HV system. |
| LI15.30-P-078376 | 2024-09-26. Service bulletin. ENGINE. Complaint Engine does not restart from ECO start. Hybrid system malfunction (Gears symbol) in instrument cluster. Fault codes below may be stored in ISA control unit. P0A44B2- Drive motor "A" Position Sensor Circuit Overspeed. The speed is below the threshold value. P0AFB00- The power supply of high voltage on-board electrical system is too high. Cause Reduced current output to ISA during ECO start. Remedy If additional faults are stored for 48V system components, process these first. Update software of ISA control unit. New software numbers - A2569022304 A2569033903 |
| 2024090007 | 2024-09-23. Service campaign. ELECTRICAL SYSTEM; ENGINE. Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY 2020-2023 CLS (257 platform), E-Class (213 and 238 platform), GLE (167 platform), and AMG GT 4-Door (290 platform) vehicles, the engine control unit software does not correspond to current production specifications. As a consequence, the functionality of the post-catalyst oxygen sensor may be impaired due to increased thermal loading. MBUSA will conduct a service campaign. An authorized Mercedes-Benz dealer will update the engine control unit software. |
| LI07.61-P-070707 | 2024-06-01. Service bulletin. ENGINE; FUEL/PROPULSION SYSTEM. The customer complains of a check engine light (CEL) on. May also complain of the engine running roughly and/or a loss of power. Multiple Causes Remedy Please see the document "Remedy Instructions" in attachments. For MY19+ G63 there may be an alternate solution available. Please reference LI07.61-P-076755 before performing the steps in this LI. |
| EW-EngineThermSW | 2024-01-03. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. In our continuing efforts to assure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz USA, LLC ("MBUSA") is extending the warranty coverage on the engine thermostat (including software update) installed in certain Model Year ("MY") vehicles (with engines M176, M177, M178) listed below from the original New Vehicle Limited Warranty of 4 years/50,000 miles to 15 years/150,000 miles (whichever occurs first), due to the following condition: In the affected vehicles, the sealing ring in the engine thermostat could detach, causing a delay in the heating of the engine coolant. This may also cause the check engine Malfunction Indicator Lamp ("MIL") to illuminate. Please follow the work instructions added to this NCU to remedy the issue. Please be advised that all repairs being claimed under this extended warranty must have a quick test uploaded with the following fault code information and may be audited. P012800 - Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) All repairs found to be functioning properly or without proper documentation will be returned and the claim debited in full. Only the following damage codes and parts may be claimed for the aforementioned repairs: Damage Code(s): 20102 - Insert, coolant thermostat o 52 - Does not operate correctly o 41 - Hard closing 20103 - Housing/cover, coolant thermostat o 73 - Electrical fault 2030T - Heating element, coolant thermostat o 53 - Insufficient effect/power o 73 - Electrical fault |
| LI20.10-P-075374 | 2022-12-05. Service bulletin. ENGINE AND ENGINE COOLING. Complaint Red coolant warning in instrument cluster. Fault codes U019F00 or U019F87 current/stored in MRG1 control unit. Cause Various causes Remedy Perform guided test for fault code U019F with XENTRY diagnosis. Verify the following connections are clean and tight. Correct any problems and retest pump actuation: -12V plug at M75/11 -48V plug at M75/11 -48V connector X192/4 -Connections at 48V fuse box F153/2 -Sockets 1,2, and 5 at connector 2 of MRG1 control unit -M75/11 circuit 41 ground If actuation and above connections are OK, but resistance between M75/11 and engine block is less than 2 ohms or heat shield touching coolant pump, proceed with below steps. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.