Credov

Mercedes-Benz C-Class W204 common problems: what to check before you buy

Credov's researched list of the 6 faults the Mercedes-Benz C-Class W204 is known for (2008–2011), 4 of them serious or costly. Each one says what to look for when you check the car, so you can spot it before you buy. Not every car has these faults: they are the ones worth checking on this model.

Known problems on the Mercedes-Benz C-Class W204

Takata airbag recall

Safety risk

2008–2012 · any · Paperwork

What to look for: Ask for proof the Takata airbags were replaced, or check the VIN on the NZ Takata lookup.

Why it matters: The notices describe the inflator housing rupturing and propelling metal fragments into the cabin, with a risk of serious injury or fatality; an open Takata recall is also a hard problem on a retail car.

Sources: 1 2 3

Electronic steering lock fails

Costly if missed

2008–2014 · Electrical

What to look for: Start the car several times from cold and hot, feeling for any delay, click or pause before it fires.

Why it matters: A failed ESL can leave the car needing a tow with no warning, and the repair - a new ESL coded to the car, sometimes with the ignition switch - is a few hundred to over a thousand dollars.

Sources: 1 2 3

Airbag warning light recall

Costly if missed

2012–2017 · any · Electrical

What to look for: Check that no airbag warning message or red airbag light stays on after start-up, and ask for the recall record.

Why it matters: The notice describes the driver's airbag deploying without a collision, which could injure and distract the driver; a live airbag warning also needs resolving before the car is retailed.

Sources: 1 2

Airbag control unit recall

Costly if missed

2007–2008 · any · Electrical

What to look for: Check the SRS airbag light comes on then goes out at start-up, and ask for the recall record.

Why it matters: Deactivated airbags remove the safety equipment the buyer is paying for, and the notice also describes restraint components triggering without cause.

Sources: 1 2

Diesel leak at the fuel filter

Minor

2009–2011 · OM651, OM642 · diesel · Engine

What to look for: Look and smell for diesel wetness or stains around the fuel filter, and ask for the recall record.

Why it matters: Diesel on the road or on hot components is the hazard the notices describe, and both campaigns land on W204/W212 diesels of an age now common in NZ stock.

Sources: 1 2

Power steering fluid leak

Minor

2009–2010 · any · Suspension and steering

What to look for: Check the power steering fluid level, look for wetness at the pump, and listen for a whine turning lock to lock.

Why it matters: Running the pump dry destroys it; the recall population is common in NZ-new W204 stock.

Sources: 1 2

Got a question about a Mercedes-Benz C-Class W204? Ask Credov: a noise, a warning light, a part or how to fix it.

Also check on every car

On top of the faults above, every Credov inspection covers the basics: fuel smell, leaks or filler rust, engine oil leaks, power steering fluid leak, drive belt cracks or squeal, rust underneath: chassis and mounts, engine mounts, engine oil level and colour, coolant level, colour and leaks, head gasket failure signs, cold start: rattle, knock or smoke, rough or hunting idle, engine running hot on gauge, gearbox or diff oil leak, swapped gearbox without lvv and more.

Other Mercedes-Benz models

Researched by Credov from manufacturer recalls and service bulletins, owner reports and workshop sources. Repair prices are typical ranges, not quotes. See also fault codes and repair costs.