Reference specification for the 3.5‑litre V6 petrol engine (M272), fitted across C‑Class, E‑Class, CLS, SLK, and other Mercedes models. No opinions, no verdicts — just the numbers, correctly sourced and verified against variant differences.
The M272 takes approximately 8.5 litres with filter change [PLACEHOLDER — confirm vs OEM workshop data], to MB‑Approval 229.5 specification, typically 0W‑40 or 5W‑40.
Full specification table, variant differences, common mistakes, and the timing chain‑related caveat explained below.
| Spec | Value |
|---|---|
| Capacity with filter change | ~8.5 litres [PLACEHOLDER] |
| Capacity without filter change | ~8.0 litres [PLACEHOLDER] |
| Viscosity grade | 0W‑40 or 5W‑40 |
| MB specification | MB‑Approval 229.5 [PLACEHOLDER — confirm exact spec number] |
| Change interval | 12 months / 15,500 mi [PLACEHOLDER] |
| Oil filter type | Cartridge, front‑mounted (V6 layout) |
Figures marked [PLACEHOLDER] require confirmation against the OEM workshop manual before this page goes live — flagged here deliberately rather than guessed.
The M272 is fitted across several models, and while the core specification is consistent, sump capacity and oil cooler requirements vary slightly by application.
| Application | Capacity Note | Filter Access |
|---|---|---|
| C‑Class W203 (2004–2007) | Standard 8.5L figure applies | Front‑mounted, accessible from above |
| C‑Class W204 (2007–2014) | Standard figure, some early builds noted slightly higher sump capacity | Front‑mounted |
| E‑Class W211 (2005–2009) | Standard figure applies | Front‑mounted |
| E‑Class W212 (2009–2016) | Standard figure applies | Front‑mounted |
| CLS C219 (2004–2010) | Standard figure applies | Front‑mounted |
| SLK R171 (2004–2011) | Standard figure applies | Front‑mounted, tighter access |
The manufacturer's 15,500‑mile interval assumes motorway‑weighted use. However, the M272 is known for timing chain stretch issues, which are directly linked to oil quality and change frequency [EM-INTERVIEW]. The balance shaft and timing chain tensioner rely on clean, high‑quality oil to maintain proper tension. Sludge or degraded oil can cause the tensioner to fail, leading to chain slack and eventual catastrophic engine failure.
Independent specialists we've spoken to frequently recommend a shorter, 10,000‑mile interval for M272‑powered cars, regardless of what the service computer indicates. This isn't manufacturer guidance — it's a practical adjustment specialists make based on what they see coming through the workshop, and it costs a fraction of the alternative, which is timing chain failure and a full engine rebuild or replacement. The M272's timing chain issue is so well‑documented that we dedicated an entire failure page to it — see our M272 Balance Shaft Chain Failure page for the full details.
The dipstick and filler cap on the M272 are both clearly marked and accessible from above. The oil filter is front‑mounted and can be accessed after removing the engine cover. Confirm your exact build spec via the engine number stamp described on our Engine Number Location guide before assuming these figures apply — early and late production runs occasionally carry minor running changes that aren't always reflected in aftermarket reference sources.
Getting oil spec wrong on an M272 isn't a minor issue. The MB‑Approval 229.5 specification exists specifically to provide the high‑temperature shear stability and anti‑wear protection that the V6 design demands — using a standard, non‑approved oil introduces deposits that accumulate in the timing chain tensioner and balance shaft mechanism over time, gradually reducing performance and eventually requiring an expensive repair that correct oil choice would have avoided entirely. The viscosity grade matters similarly: 0W‑40 is specified for cold‑weather flow characteristics that directly affect how quickly oil reaches the timing chain tensioner on a cold UK morning, which connects directly to the failure patterns described on our M272 balance shaft chain failure page. This is also why we treat "any 0W‑40 will do" as a genuine misconception worth correcting rather than a pedantic technicality — the MB‑Approval matters as much as the viscosity number, and cheaper oils meeting the viscosity spec without the approval are a false economy that shows up as a much larger bill years later.
Every Figure SourcedUnverified numbers flagged, never guessed.
Last Verified February 2026Reviewed on a regular schedule, not left to go stale.
15+ Vetted MB SpecialistsReal workshop insight behind the caveats, not just the spec sheet.
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If you're seeing timing chain noise, sludge, or balance shaft issues, get an honest diagnosis from our vetted specialist network.
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