A more efficient, turbocharged evolution of the C-Class — the engine page's timing chain checklist is worth working through, though this is a meaningfully different, newer design than the troubled M272 V6 found in the older C300.
The C-Class's compact executive body is a comfortable, unstressed load for this turbocharged four — genuinely good efficiency without feeling underpowered for everyday use.
If you've read about the older C300's balance shaft issue on this site, this engine is a meaningfully different, newer design — the M274's own documented concerns, detailed on its page, are a separate matter worth checking on their own terms.
This is about the car itself — for engine-specific failure points, see the dedicated engine page below.
This C250 is a defining application of the M274. Full detail on this engine's timing chain tensioner consideration lives on the dedicated engine page.
FULL ENGINE BREAKDOWNMercedes-Benz M274 2.0L Turbo — Reliable or Not →Listen for a rattle on cold start, the clearest warning sign of timing chain tensioner wear covered on the engine page.
Ask for documented oil change history, since this engine rewards consistent, high-quality maintenance.
A specialist diagnostic scan can catch early chain-related codes that haven't yet become noticeable symptoms.