Oil-Mercedes-Benz uses its own MB 229.x specification system that has evolved through multiple generations. Getting the correct sheet number is critical — especially for modern OM654 and M282 engines with Nanoslide bore coatings where incorrect oil chemistry can damage the cylinder walls.
MB 229.5 — Standard Petrol & Older Diesel (5W-30 / 5W-40)
MB 229.5 is the long-standing specification for Mercedes petrol engines and older diesel engines without DPF. It requires SAE 5W-30 or 5W-40 based on ACEA A3/B4 chemistry with mid-SAPS content. This covers the M271, M272, M273, and many other engines from the 2000s and 2010s. It is the most widely available Mercedes specification and remains valid for a large number of vehicles on the road. MB 229.5 supports Mercedes' ASSYST Plus variable service intervals up to 25,000 km.
MB 229.51 — Diesel with DPF (5W-30)
MB 229.51 is the low-SAPS specification for Mercedes diesel engines with diesel particulate filters, including the OM651 four-cylinder and OM642 V6. It requires SAE 5W-30 based on ACEA C3 chemistry. The reduced sulphated ash content protects the DPF from premature blockage. MB 229.51 is backwards compatible with MB 229.31 but not with MB 229.5 — using 229.5 oil in a DPF-equipped diesel will shorten the filter's lifespan.
MB 229.52 — Latest Low-SAPS Standard (5W-30)
MB 229.52 supersedes MB 229.51 with improved anti-wear performance and enhanced fuel economy properties. It is the primary specification for the OM654 diesel engine and many current M264/M256 petrol engines. It requires SAE 5W-30 with low-SAPS chemistry. MB 229.52 is backwards compatible with 229.51 — you can use 229.52 oil in any engine that specifies 229.51, but not vice versa.
MB 229.71 — Ultra-Low Viscosity (0W-20)
MB 229.71 is Mercedes' newest specification for engines designed around ultra-low viscosity SAE 0W-20 oil. It covers the latest OM654 diesel and M282 petrol engines (the 1.3L turbo co-developed with Renault, used in the A-Class and B-Class). This spec is not backwards compatible — only use it in engines specifically requiring 229.71. The M282 engine in particular has tight bearing clearances optimised for 0W-20 and will not tolerate thicker oil long-term.
OM654 Nanoslide — Bore Coating Sensitivity
The OM654 2.0L diesel engine introduced aluminium construction with Nanoslide wire-arc-sprayed steel bore coatings — the same technology BMW uses. This coating reduces friction and weight but is sensitive to oil chemistry. High-ash oils can erode the Nanoslide layer over time, leading to increased oil consumption and bore scuffing. Only oils meeting MB 229.52 or 229.71 contain the correct additive balance to protect this coating. The OM654 replaced the OM651 across the C-Class, E-Class, GLC, and Sprinter.