C-ClassEngines for Sale —Used & Reconditioned

Seventeen engine families cover the C-Class from 2000 to the present. W203 cars used M111, M271, M112 and M113 petrols with OM611, OM612, OM646 and OM642 diesels; the W204 added the OM651 and the C63's M156; the W205 ran M274, M264 and M276 petrols with OM651, OM654 and a Renault-sourced 1.6 diesel; and the current W206 pairs the OM654 diesel with AMG's M139. Every family has its own page listing every compatible unit.

The fastest way is the registration checker on this page — it identifies your exact model year and factory-fitted engine code from DVLA vehicle data before you order. You can also find the engine details recorded on your V5C registration document, and the engine code is stamped on the block itself. If two engines served your variant across a transition year, the checker confirms which one your car left the factory with.

It depends on the family. The OM646, M271 and M112 have had strong donor availability historically, so a tested used unit is often the cost-effective route. For the OM651 and OM654 diesels used across later cars, a reconditioned unit with a 12-month unlimited-mileage warranty is available as a selectable option on most listings — the right choice where maximum service life matters more than the lowest price.

Reconditioned C-Class engines carry a 12-month, unlimited-mileage warranty on internal mechanical components, and used engines state their own warranty term on each listing before you buy. Delivery is UK mainland by kerbside pallet, typically 2 to 4 working days for in-stock units with tracking emailed on dispatch, and any engine that proves incompatible can be returned uninstalled within 14 days for a full refund.