According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2024 Mercedes-Benz AMG GT has 7 documented known issues, with 5 rated critical. The most serious are MBUX Instrument Cluster Blackout / Reboot While Driving (NHTSA Recall, May 2026), High-Voltage Starter-Alternator Control Unit Software Fault Causes Loss of Drive Power (GT 63 S E Performance Plug-In Hybrid), Fuel Pump Impeller Deformation Causes Engine Shutdown and Failure to Restart, Misrouted Transmission Wiring Harness Connector Corrodes and Short-Circuits (Fire Risk, Recall Repeated After Failed First Remedy) and 48-Volt EQ Boost System: Loose Ground Cable (Fire Recall) and 48V Battery / Starter-Generator Failure Causing No-Start ($900-$3,500 repair). Across all issues with published estimates, repair costs range from $250 to $3,500. DIY maintenance guides at au7o.io.
On the 2024-2026 Mercedes-Benz AMG GT, nHTSA recall 26V-281 covers certain 2024-2026 platform-192 AMG GT vehicles whose infotainment-control-unit software may trigger increased system resets. During a reset, the instrument cluster may briefly stop displaying driving-related information, increasing crash risk. The report lists 144,049 vehicles across all included Mercedes model lines; that total is not an AMG GT owner-report count.
brief interruption of driving information in the instrument cluster
infotainment system reset under the recalled software condition
VIN identified in campaign 2026050004
How to Fix
Check the VIN for open Mercedes campaign 2026050004. An authorized Mercedes-Benz dealer updates the infotainment control-unit software on affected vehicles. Do not buy a display, battery or control unit from this page; the official remedy is VIN-controlled software unless separate diagnosis establishes an unrelated hardware fault.
On the 2023-2025 Mercedes-Benz AMG GT M177 4.0L twin-turbo V8 plug-in hybrid (E Performance), the AMG GT 63 S E Performance is a plug-in hybrid and is a fundamentally different electrical architecture from every other GT — it carries a high-voltage battery and a high-voltage starter-alternator on top of the M177 V8. NHTSA campaign 25V129000 covers 2023-2024 and 2025 AMG GT 63 S E Performance four-door coupes (alongside GLC 63 S E Performance, S 63 E Performance and SL 63 S E Performance) for a software error that can cause the high-voltage starter-alternator control unit to fail, resulting in a loss of drive power. This is not the 48V EQ Boost ISG issue of the GT 43/53 and not a 12V fault; it is the HV traction-side starter-alternator on the E Performance powertrain only, and it must not be attributed to the non-hybrid GT 63.
Common Symptoms
Sudden loss of drive power
Hybrid or drivetrain malfunction warning
Vehicle enters reduced-power mode
Failure to start on electric drive
How to Fix
Free recall remedy: the dealer updates the high-voltage starter-alternator control unit software under 25V129000. Because the remedy is software, it is quick and there is no reason to defer it. Owners can confirm applicability by VIN at nhtsa.gov/recalls or through MBUSA customer service. If drive power has already been lost once, have the fault memory read before the update so the event is documented — the reflash clears the evidence.
On the 2019-2025 Mercedes-Benz AMG GT M256 3.0L turbo inline-6 with EQ Boost, on the X290 four-door AMG GT (GT 43 / GT 53), the transmission wiring harness can be routed incorrectly so that the electrical connector sits where it is exposed to water and road spray. The connector corrodes, and the corroded contacts can short-circuit — which Mercedes-Benz itself describes as increasing the risk of fire, and which can also strand the car with transmission fault messages. NHTSA campaign 22V533000 covered 2019-2022 GT 53 and 2021-2022 GT 43. That remedy did not hold: campaign 24V445000 was opened afterward for 2019-2025 GT 53 and 2021-2024 GT 43 because the harness connection 'might not have been correctly wired during a prior recall repair or during production' — meaning cars that already had the first recall performed can still be defective. This is a four-door X290 issue tied to the 9G-TRONIC installation and does not transfer to the C190 two-door's rear transaxle DCT.
Common Symptoms
Transmission fault or limp-home message
Intermittent shifting faults that come and go with weather
Burning-plastic smell from under the vehicle
Corroded green residue on transmission harness connector
How to Fix
Free recall remedy. Under 22V533000 the dealer inspects and repairs the connector, reroutes the harness and installs a retaining bracket. Under the superseding 24V445000 the dealer replaces the two-part wiring harness and the connector outright — the more durable fix. Do not accept 'recall already done' as closing this out on a GT 43/GT 53: check the VIN specifically against 24V445000, since that campaign exists precisely to catch cars the earlier repair left wrong. If the car is showing intermittent transmission faults, have the connector inspected for green corrosion before any transmission control unit is condemned.
On the 2019-2025 Mercedes-Benz AMG GT M256 3.0L turbo inline-6 with EQ Boost 48V ISG, the GT 43 and GT 53 use the M256 inline-six with a 48-volt EQ Boost integrated starter-generator that replaces the conventional starter and alternator. Two distinct failures cluster here. First, a safety defect: NHTSA campaign 24V100000 covers 2021-2023 GT 43 and GT 53 whose 48-volt ground cable connection was not tightened to specification — a high-resistance ground on a 48V circuit overheats, with fire risk. Second, and far more common in owner reports, the 48V lithium battery and the ISG itself fail. Because the ISG is the starter, a failed 48V battery is not a degraded-performance condition the way a weak 12V battery is: the car simply will not crank, typically after a '48V onboard electrical system malfunction' or hybrid-battery-depleted warning. Owners on MBWorld discuss this specifically for GT 43/GT 53. This is distinct from ordinary 12V drain — it is the 48V subsystem, it is M256-specific, and it does not exist on the M177/M178 V8 GT 63 or on the C190 two-door.
Common Symptoms
48V onboard electrical system malfunction message
Vehicle will not crank or start at all
Loss of stop/start and EQ Boost torque fill
Intermittent check engine light with hybrid battery depleted fault
Overheated or discolored 48V ground cable terminal
How to Fix
For the ground cable, a free recall remedy exists: under 24V100000 the dealer inspects and tightens the 48-volt ground cable connection. For the battery/ISG failure there is no recall — the 48V lithium battery is replaced as a part (it lives under the passenger seat or in the trunk area depending on build), and a failed integrated starter-generator is a much larger job requiring belt-drive/front-accessory access. Diagnose before parts-swapping: a bad 48V ground or a corroded 48V connector produces the same no-start and the same malfunction message as a dead 48V battery, and the ground is the cheaper thing to rule out first.
On the 2024-2025 Mercedes-Benz AMG GT, mercedes' current electronic architecture (shared across the C192 AMG GT, W206 C-Class, X254 GLC, and EQE/EQS) has documented 12V battery drain complaints from control modules not sleeping properly — typically the telematics / mbrace head unit polling cellular at idle. On the AMG GT specifically, there's no model-specific TSB yet, but the same root cause applies: cars left parked for 1-2+ weeks may need a jump-start, and battery management warnings can appear on the cluster. The W206 has a TSB (LI54.10-P-076820); EQE/EQS got a 2024 software recall (24V-372). Typical remedy on AMG GT is a software update at the dealer or, if the battery has been damaged by repeated deep discharge, replacement (~$400-600 for the AGM unit). Most cases are nuisance-level; severity downgraded from medium to low for that reason.
Perform a parasitic draw test after the vehicle times out, then scan all body, telematics, and gateway modules for wake-up events or software faults. Dealers often address this with software updates, battery testing/replacement, and in some cases replacement of a module that remains awake. Owners who store the car or drive infrequently often use a maintainer to prevent repeat discharge while the root cause is being resolved.
What you need to diagnose it
The fix here starts with a test, not a part — which repair you need depends on what the test finds.
UNI-T UT210E Low-Current DC Clamp Meter
1 mA resolution on the 2 A range — a 0.1 A meter reads a 50 mA drain as zero
As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.
Testing and isolating the fault is DIY work. Replacing or reprogramming a control module is not — most are VIN-programmed, so a new one does nothing until a shop codes it to your car. Check for an open recall or service bulletin before buying anything.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
CTEK MXS 5.0 NA 12-volt AGM-compatible charger/maintainer
OEMCTEK 40-206 MXS 5.0 NA
Storage maintenance for a verified 12-volt lead-acid/AGM battery while the root cause is diagnosed Fitment/availability: The inspected U.S. manufacturer page identifies item 40-206 for 12-volt lead-acid batteries including AGM/EFB, 1.2-1…
On the 2021-2024 Mercedes-Benz AMG GT, the in-tank fuel pump fitted to a broad range of 2021-2024 Mercedes-Benz models including the AMG GT uses an impeller that did not meet material specification. The impeller swells or deforms in service, contacts the pump housing and binds. The mechanical resistance shuts the pump down, and the vehicle loses propulsion without warning — the car will not restart afterward. Mercedes-Benz's Part 573 report notes that before a full stall the engine may run rough and warning lamps may illuminate, which is the only advance notice an owner gets. NHTSA campaign 23V880000 covers more than 87,000 vehicles across GLE, GLS, C-, E-, S-, SL-, GLC-, CLS-Class, G-Class and AMG GT. Because MBUSA issued an interim notice in February 2024 before the final remedy was ready, a number of owners were told their car was defective months before a fix existed, and some cars were stalled in the interim.
Engine stalls without warning and will not restart
Rough running before shutdown
Fuel system warning lamp illuminates
Loss of propulsion while driving
How to Fix
Free recall remedy: the dealer replaces the fuel pump under 23V880000. Interim owner letters went out February 13, 2024 with a second notice once the remedy parts were released, so a car whose only paperwork is the interim letter has NOT been repaired. Verify the VIN at nhtsa.gov/recalls and confirm the pump was actually replaced rather than merely inspected. Treat a rough-running condition or a sudden fuel-system warning on an affected car as urgent rather than as a routine drivability complaint — the documented failure mode ends in an unrestartable stall.
On the 2024-2025 Mercedes-Benz AMG GT, the 2024+ AMG GT uses rear-axle steering and a dense network of chassis sensors tied into stability control and driver assistance systems. Early-owner reports describe warning messages for steering assist, ESP, or driver assistance functions, sometimes after alignment work, low battery events, or software glitches. In many cases the hardware is intact, but calibration values or sensor initialization are lost or out of range.
Scan the steering, ESP, and rear-axle steering modules for stored faults, then verify alignment and ride-height values before recalibrating steering-angle and chassis sensors. Dealers commonly perform software updates and guided calibrations; if faults return, they inspect wheel-speed sensors, steering rack/rear-steer actuators, and wiring. A low-voltage event should be ruled out first because it can trigger multiple false chassis warnings.
What are the most common Mercedes-Benz AMG GT problems?
According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2024 Mercedes-Benz AMG GT has 7 documented issues. The most frequently reported are: MBUX Instrument Cluster Blackout / Reboot While Driving (NHTSA Recall, May 2026), High-Voltage Starter-Alternator Control Unit Software Fault Causes Loss of Drive Power (GT 63 S E Performance Plug-In Hybrid), Fuel Pump Impeller Deformation Causes Engine Shutdown and Failure to Restart. Of these, 5 are rated critical and should be addressed promptly.
Is the Mercedes-Benz AMG GT reliable?
The 2024 Mercedes-Benz AMG GT has 7 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 5 issues are rated critical: MBUX Instrument Cluster Blackout / Reboot While Driving (NHTSA Recall, May 2026) and High-Voltage Starter-Alternator Control Unit Software Fault Causes Loss of Drive Power (GT 63 S E Performance Plug-In Hybrid) and Fuel Pump Impeller Deformation Causes Engine Shutdown and Failure to Restart and Misrouted Transmission Wiring Harness Connector Corrodes and Short-Circuits (Fire Risk, Recall Repeated After Failed First Remedy) and 48-Volt EQ Boost System: Loose Ground Cable (Fire Recall) and 48V Battery / Starter-Generator Failure Causing No-Start. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
How much does it cost to fix common Mercedes-Benz AMG GT problems?
Repair costs for known Mercedes-Benz AMG GT issues range from $0 to $3,500, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What is the 2024-2026 Mercedes-Benz AMG GT MBUX Instrument Cluster Blackout / Reboot While Driving (NHTSA Recall, May 2026)?
NHTSA recall 26V-281 covers certain 2024-2026 platform-192 AMG GT vehicles whose infotainment-control-unit software may trigger increased system resets. During a reset, the instrument cluster may briefly stop displaying driving-related information, increasing crash risk. The repo… Severity: high.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.
What is the 2023-2025 Mercedes-Benz AMG GT High-Voltage Starter-Alternator Control Unit Software Fault Causes Loss of Drive Power (GT 63 S E Performance Plug-In Hybrid)?
The AMG GT 63 S E Performance is a plug-in hybrid and is a fundamentally different electrical architecture from every other GT — it carries a high-voltage battery and a high-voltage starter-alternator on top of the M177 V8. NHTSA campaign 25V129000 covers 2023-2024 and 2025 AMG G… Severity: high.
What is the 2021-2024 Mercedes-Benz AMG GT Fuel Pump Impeller Deformation Causes Engine Shutdown and Failure to Restart?
The in-tank fuel pump fitted to a broad range of 2021-2024 Mercedes-Benz models including the AMG GT uses an impeller that did not meet material specification. The impeller swells or deforms in service, contacts the pump housing and binds. The mechanical resistance shuts the pump… Severity: high.
What is the 2019-2025 Mercedes-Benz AMG GT Misrouted Transmission Wiring Harness Connector Corrodes and Short-Circuits (Fire Risk, Recall Repeated After Failed First Remedy)?
On the X290 four-door AMG GT (GT 43 / GT 53), the transmission wiring harness can be routed incorrectly so that the electrical connector sits where it is exposed to water and road spray. The connector corrodes, and the corroded contacts can short-circuit — which Mercedes-Benz its… Severity: high.
What is the 2019-2025 Mercedes-Benz AMG GT 48-Volt EQ Boost System: Loose Ground Cable (Fire Recall) and 48V Battery / Starter-Generator Failure Causing No-Start?
The GT 43 and GT 53 use the M256 inline-six with a 48-volt EQ Boost integrated starter-generator that replaces the conventional starter and alternator. Two distinct failures cluster here. First, a safety defect: NHTSA campaign 24V100000 covers 2021-2023 GT 43 and GT 53 whose 48-v… Repairs typically run $900-$3,500. Severity: high.
What is the 2024-2025 Mercedes-Benz AMG GT Rear-Axle Steering / Driver Assistance Warning Messages from Chassis Sensor Calibration Faults?
The 2024+ AMG GT uses rear-axle steering and a dense network of chassis sensors tied into stability control and driver assistance systems. Early-owner reports describe warning messages for steering assist, ESP, or driver assistance functions, sometimes after alignment work, low b… Repairs typically run $250-$2,200. Severity: medium.
What is the 2024-2025 Mercedes-Benz AMG GT 12V Battery Drain from Telematics / Sleep-Mode Module Wakes (Platform-Wide Pattern)?
Mercedes' current electronic architecture (shared across the C192 AMG GT, W206 C-Class, X254 GLC, and EQE/EQS) has documented 12V battery drain complaints from control modules not sleeping properly — typically the telematics / mbrace head unit polling cellular at idle. On the AMG… Repairs typically run $0-$700. Severity: low.
