2018 Mercedes-Benz AMG GT Problems: 1 Issues Every Owner Should Know
2018 model year · 210+ owner reports · Updated May 2026
According to Au7o's analysis of 210+ owner reports, the 2018 Mercedes-Benz AMG GT has 1 documented known issues. No issues are rated critical, indicating generally reliable ownership. The most commonly reported issue is Active Transaxle Mount Connectivity Faults and Replacement with 210 owner reports. Across all issues, repair costs range from $400 to $2,800. DIY maintenance guides at au7o.io.
All 1 Known Issues
On the 2016-2022 Mercedes-Benz AMG GT 4.0L V8 Biturbo M178, the C190 AMG GT mounts its rear transaxle on three ACTIVE (electronically controlled) mounts that stiffen under hard cornering and soften at idle. The most common reported failure isn't rubber breakdown — it's wiring harness or connector corrosion at the mount sensors, which trips dash warnings ("Suspension malfunction" / "Engine/transmission mount fault") and forces the mounts into a default-soft state. The fix is usually harness cleaning or connector replacement; full mount replacement is uncommon but expensive when needed (active mounts are pricey OEM parts and labor at the rear of the car is significant). The original entry incorrectly described these as passive hydraulic mounts.
Common Symptoms
- Clunk when shifting gears
- Vibration through cabin at low speed
- Harsh engagement when going from park to drive
- Drivetrain shudder during acceleration
How to Fix
Replace the transaxle mounts with updated Mercedes parts. Inspect the torque tube bearing simultaneously. Use OEM mounts unless the car is tracked, in which case solid mounts from aftermarket suppliers may be preferred.
What Owners Are Using
Parts and tips from 210+ owners who fixed this issue
- TipTrack use accelerates mount wear dramatically. If you track your AMG GT, inspect the transaxle mounts every 15,000 miles.