2026 Mercedes-Benz AMG GT43 Problems
Owner-reported complaints filed with NHTSA, grouped by component
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What this page shows
Everything below is an owner-reported complaint submitted to NHTSA about the 2026 Mercedes-Benz AMG GT43, grouped by the component NHTSA recorded on the report. These are not confirmed defects, and they are not recalls. NHTSA does not verify most reports before publishing them, and a category with more reports in it is not evidence that a part is defective.
Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.
Reports by component
Ranked by how many owner reports name each component category
- Electrical133.3%
- Engine133.3%
- Fuel system133.3%
Percentages are of component mentions. A single complaint can name more than one component, so these do not sum to the total complaint count.
Each component in detail
What the reports in each category say, in the owners' own words
Electrical
Reports naming the electrical system — wiring, battery, charging, control modules, infotainment and electrical accessories.
From owner reports, verbatim
On April 17, 2026, my 2026 Mercedes-AMG GT Coupe experienced a sudden and complete electrical failure while operating on a public roadway in Texas. The vehicle lost propulsion and became completely disabled in active traffic during dusk/nighttime conditions. All electrical systems failed simultaneously, including lighting and hazard lights. The vehicle could not be restarted, moved, or recharged roadside and was effectively “bricked.” This created a serious safety hazard because the vehicle was stranded in traffic with no hazard lights or electrical warning systems available to alert surrounding vehicles. Police officers responded to protect the vehicle and occupants due to the dangerous roadway location. Due to the low ride height/body configuration of the vehicle, a specialized tow truck was required, causing the disabled vehicle to remain exposed in traffic for more than five hours. The vehicle was finally removed around 11:00 PM and transported to a Mercedes-Benz service center. Mercedes-Benz service documentation confirmed: Internal failure involving the 12V battery system Consequential overload/failure of the 48V system Multiple diagnostic trouble codes Vehicle shutdown conditions The vehicle and components are available for inspection upon request. The condition was confirmed and inspected by Mercedes-Benz technicians and police officers at the scene. Prior to the total failure, dashboard warning messages and malfunction alerts had appeared. After repairs including replacement of the 12V and 48V systems, the vehicle again displayed warning messages on May 7, 2026: “Cooling System Malfunction – Reduced Drive Power – Service Required.” Because this warning resembled the precursor symptoms before the original total shutdown event, the vehicle was immediately returned to the same Mercedes-Benz service center to prevent another dangerous roadway failure.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Engine
Reports naming the engine itself — including stalling, misfires, oil consumption, cooling and internal engine components.
From owner reports, verbatim
On April 17, 2026, my 2026 Mercedes-AMG GT Coupe experienced a sudden and complete electrical failure while operating on a public roadway in Texas. The vehicle lost propulsion and became completely disabled in active traffic during dusk/nighttime conditions. All electrical systems failed simultaneously, including lighting and hazard lights. The vehicle could not be restarted, moved, or recharged roadside and was effectively “bricked.” This created a serious safety hazard because the vehicle was stranded in traffic with no hazard lights or electrical warning systems available to alert surrounding vehicles. Police officers responded to protect the vehicle and occupants due to the dangerous roadway location. Due to the low ride height/body configuration of the vehicle, a specialized tow truck was required, causing the disabled vehicle to remain exposed in traffic for more than five hours. The vehicle was finally removed around 11:00 PM and transported to a Mercedes-Benz service center. Mercedes-Benz service documentation confirmed: Internal failure involving the 12V battery system Consequential overload/failure of the 48V system Multiple diagnostic trouble codes Vehicle shutdown conditions The vehicle and components are available for inspection upon request. The condition was confirmed and inspected by Mercedes-Benz technicians and police officers at the scene. Prior to the total failure, dashboard warning messages and malfunction alerts had appeared. After repairs including replacement of the 12V and 48V systems, the vehicle again displayed warning messages on May 7, 2026: “Cooling System Malfunction – Reduced Drive Power – Service Required.” Because this warning resembled the precursor symptoms before the original total shutdown event, the vehicle was immediately returned to the same Mercedes-Benz service center to prevent another dangerous roadway failure.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Fuel system
Reports naming fuel storage or delivery — tanks, pumps, lines, injectors and fuel leaks.
From owner reports, verbatim
On April 17, 2026, my 2026 Mercedes-AMG GT Coupe experienced a sudden and complete electrical failure while operating on a public roadway in Texas. The vehicle lost propulsion and became completely disabled in active traffic during dusk/nighttime conditions. All electrical systems failed simultaneously, including lighting and hazard lights. The vehicle could not be restarted, moved, or recharged roadside and was effectively “bricked.” This created a serious safety hazard because the vehicle was stranded in traffic with no hazard lights or electrical warning systems available to alert surrounding vehicles. Police officers responded to protect the vehicle and occupants due to the dangerous roadway location. Due to the low ride height/body configuration of the vehicle, a specialized tow truck was required, causing the disabled vehicle to remain exposed in traffic for more than five hours. The vehicle was finally removed around 11:00 PM and transported to a Mercedes-Benz service center. Mercedes-Benz service documentation confirmed: Internal failure involving the 12V battery system Consequential overload/failure of the 48V system Multiple diagnostic trouble codes Vehicle shutdown conditions The vehicle and components are available for inspection upon request. The condition was confirmed and inspected by Mercedes-Benz technicians and police officers at the scene. Prior to the total failure, dashboard warning messages and malfunction alerts had appeared. After repairs including replacement of the 12V and 48V systems, the vehicle again displayed warning messages on May 7, 2026: “Cooling System Malfunction – Reduced Drive Power – Service Required.” Because this warning resembled the precursor symptoms before the original total shutdown event, the vehicle was immediately returned to the same Mercedes-Benz service center to prevent another dangerous roadway failure.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.
Elsewhere on this vehicle
Data sources
- NHTSA Office of Defects Investigation — owner-reported complaints and the components recorded on them
Data on this page last refreshed .