Mercedes-Benz CLA Timing Chain Replacement Parts

All Mercedes-Benz CLA engines across both generations use a timing chain rather than a timing belt, so there is no scheduled belt replacement interval on this model. This applies to the petrol and diesel variants alike, covering the C117 generation (2013–2019) and the C118 generation (2019 onwards). The chain is designed to last the life of the engine, though wear, stretch, and rattles on start-up are known issues on higher-mileage examples.

Both of those years fall within the same C117 generation (2013–2019, facelifted in 2016), so there is a reasonable chance the chain will be compatible if the engine codes match exactly. The engine code is the single most reliable guide here — it appears on your V5 or via a VIN check — and you should supply it to the breaker rather than relying on year alone. Confirm with the breaker against your registration before buying, as ancillary components around the chain assembly can vary mid-production.

The C117 (2013–2019) and C118 (2019 onwards) are distinct generations built on different platforms and carrying updated engine families, so the timing chains are very unlikely to interchange directly. Even where an engine code appears similar across the two generations, internal specifications can differ, and a chain from the older car should not be assumed to fit the newer one. Always supply your engine code to the breaker and ask them to verify compatibility against your specific registration.

Yes, the badge matters here because it reflects a different engine, and each engine has its own timing chain specification. For example, the 220d diesel uses a different engine family to the 200 or 250 petrol, so the chains are not interchangeable across fuel types. Within the same fuel type, engine codes can still differ between variants, so always confirm the exact engine code from your V5 or a VIN check and give that to the breaker — the badge alone is not enough to guarantee a match.

Trim level has no bearing on the timing chain whatsoever — Sport, AMG Line, SE, and any other trim designation are cosmetic and equipment-level differences that do not change the engine internals. What matters is the engine code, which will be identical across trim levels if the same engine is fitted. Simply confirm your engine code with the breaker and the trim badge can be ignored entirely for this part.

Timing chain rattle, particularly on cold start, is a known concern on some CLA engine variants and is often a sign of a worn chain, tensioner, or guides rather than just the chain itself. When sourcing from a breaker, ask about the mileage and condition of the donor vehicle and whether the chain is being supplied with the tensioner and guides, as fitting a used chain to address wear issues carries some risk if the replacement parts are equally worn. A good breaker will be able to advise on the condition of the parts and confirm they suit your engine code, so supply your registration and engine code when requesting a quote.