Common Problems with the
2013–2014 Mercedes-Benz C-Class (W204)

We've identified 2 known issues that can affect the 2013–2014 Mercedes-Benz C-Class (W204). 1 of these are serious faults that could be expensive to repair.

Known Issues

Serious

Moderate

Minor

The 2013–2014 period has 1 more issue than the Mercedes-Benz C-Class (W204) average across all year periods.

All Known Issues

Rear Subframe Corrosion

SeriousSuspension & Chassis

The rear subframe rots from the inside out, leading to MOT failure. Mercedes often replaces these under goodwill.

Estimated cost: £0 (Goodwill) – £1,500Affects: 2007–2014

Typical symptoms

•Heavy corrosion noted by MOT
•Rust on suspension mounts

What to inspect before you buy

✓Request a subframe inspection at a main dealer

OM651 Diesel Chain Tensioner Oil Leak

ModerateEngine

The gasket on the timing chain tensioner can fail, leaking oil and potentially leading to timing chain issues due to inconsistent tension.

Most affected: C 200 CDI, C 220 CDI, C 250 CDI

Estimated cost: £200–£450Affects: 2009–2014Often appears around: 50,000–100,000 miles

Typical symptoms

•Oil leaking onto the right side of the engine block
•Rattle on cold start

What to inspect before you buy

✓Check the side of the engine block for oil dampness
✓Listen for chain noise on a cold start

Buying Tips for the 2013 Mercedes-Benz C-Class (W204)

✓Inspect the rear subframe very carefully; ask about Mercedes goodwill replacement.
✓Listen for steering lock (ESL) failure signs.
✓M271 petrols need timing chain checks.

2009–2012 Mercedes-Benz C-Class (W204)