KNOWN FAULTS · Mercedes-Benz
Mercedes-Benz SL (R232) SL 43 AMG (2.0) common problems.
2021–2026 · Petrol
Sources are not verified in real time and no entry confirms that your car is affected.
2 known faults with sources
Applies if: Only the engine-ECU software campaign (2024–2025) affects the SL 43.
Starter harness, fuse box and engine-ECU software on the SL and AMG GT (from 2022)Electrical and electronic systems
- Engine / equipment
- Mercedes-AMG SL R232 and AMG GT C192
- Period mentioned
- 2022–2025
- Symptoms
- Sudden loss of drive; a battery drained while parked; in the worst case, fire risk.
- Possible cause described
- NHTSA 23V-676: on about 5,300 2022–2023 SLs with the M177 V8 the starter/alternator harness could rub on the driveshaft and short-circuit (it is secured with a cable tie). In Australia the fuse box was replaced on 2023 SL 63s. In Qatar the 2024–2025 SL and AMG GT were recalled because the engine-ECU software can greatly increase the quiescent current.
- Check for the garage
- Check by VIN at the dealer that the campaign has been done.
- Cost cited in the source
- Free under the recall.A rough figure from the original database, not an up-to-date quote.
Sources from the original database
NHTSA 23V-676: SL starter harnessAustralianCar.Reviews: Mercedes-AMG R232 SL recalls and faultsThe Peninsula (Qatar): recall of 2024–2025 AMG SL and AMG GT
View full entryApplies if: US bulletin (XENTRY LI27.60-P-076554) for the C 43, SL 43 and C 63 S E Performance with the M139 engine and 725.1 gearbox; in Europe, ask the dealer.
Harsh shifts from 1st to 4th and jolts when pulling away (AMG 43 and C 63 S E Performance with M139)Automatic gearbox
- Engine / equipment
- Mercedes-AMG C 43, SL 43 and C 63 S E Performance (M139, 2.0) with the 725.1 gearbox
- Period mentioned
- 2022–2025 (US model years)
- Symptoms
- Harsh 1st-to-2nd, 2nd-to-3rd and 3rd-to-4th shifts, jerky shifting and a jolt when accelerating from a stop.
- Possible cause described
- The gearbox software learns clutch fill times and torque values that are too high. In the E Performance, shifting also gets worse when the high-voltage battery drops below 25 %. Mercedes-Benz describes it in technical note LI27.60-P-076554.
- Check for the garage
- Ask the garage to check the gearbox software level (VGS) and apply note LI27.60-P-076554 (update, oil level and valve flushing) before replacing parts.
- Cost cited in the source
- No verified estimate; ask the garage for a quote.A rough figure from the original database, not an up-to-date quote.