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Mercedes-Benz CLA C117 common problems: what to check before you buy

Credov's researched list of the 4 faults the Mercedes-Benz CLA C117 is known for (2014–2015), 2 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 CLA C117

Timing chain tensioner oil leak

Costly if missed

2014–2015 · OM651 · diesel · Engine

What to look for: Look at the back of the engine near the gearbox for fresh oil, and ask for the tensioner seal recall record.

Why it matters: Oil loss from the tensioner can stall the engine and is a fire risk per the recall notice; loss of tensioner preload also accelerates chain wear on an engine whose chain replacement is labour-heavy.

Sources: 1 2 3

Dual-clutch gearbox fault

Costly if missed

2015–2016 · any · Gearbox

What to look for: Ask for the gearbox clutch recall record, and feel for shudder, slipping or loss of drive under load.

Why it matters: Loss of drive from a clutch pack failure means a transmission-out repair on a dual clutch box.

Sources: 1 2

Power steering warning at start-up

Minor

2013–2014 · any · Suspension and steering

What to look for: Check for a power steering warning at start-up, and feel for heavy or uneven steering turning lock to lock.

Why it matters: The bulletin's fallback remedy is replacing the steering control/motor unit, which is not a cheap part, and sluggish assistance on the road test is something a retail buyer will notice immediately.

Sources: 1

Starter overheating fault

Minor

2015–2017 · any · Electrical

What to look for: Ask for the starter recall record, and listen for quick, even cranking at cold start rather than slow or patchy cranking.

Why it matters: Fire risk recall; also a pointer to a tired starter on a stop-start car.

Sources: 1 2

Got a question about a Mercedes-Benz CLA C117? 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.