Common Problems with the
2021–2024 Mercedes-Benz C-Class (W206)

We've identified 2 known issues that can affect the 2021–2024 Mercedes-Benz C-Class (W206). 1 of these are serious faults that could be expensive to repair.

Known Issues

Serious

Moderate

Minor

The 2021–2024 period has 1 more issue than the Mercedes-Benz C-Class (W206) average across all year periods.

All Known Issues

48V Mild-Hybrid (EQ Boost) Failure

SeriousElectrics & Electronics

The 48V battery or integrated starter generator can fail, leaving the car unable to start.

Most affected: C 200, C 220 d, C 300

Estimated cost: £0 (Warranty) – £2,000Affects: 2021–2024

Typical symptoms

•"Battery Malfunction" warning
•Engine fails to start
•Loss of start-stop function

What to inspect before you buy

✓Check for recall status or software updates regarding the 48V system

Software and Electronic Glitches

MinorElectrics & Electronics

Frequent reports of central screen freezing and minor electrical bugs.

Estimated cost: £0 (Warranty)Affects: 2021–2024

Typical symptoms

•Screen lag
•Navigation errors
•CarPlay/Android Auto disconnection

What to inspect before you buy

✓Confirm latest software updates have been installed

Buying Tips for the 2021 Mercedes-Benz C-Class (W206)

✓Test the massive central screen for responsiveness.
✓Check for any "Battery Malfunction" warnings, which can indicate 48V system issues.
✓Verify all safety electronics are functioning correctly.

2025 Mercedes-Benz C-Class (W206)