Mercedes-AMG M275 — 5.5L V12 Engine
5.5L V12 · 612-630 hp · 1000 Nm
The M275 is the Mercedes-AMG 5.5-litre twin-turbocharged V12 petrol, built 2002-2016 and producing 612-630 hp with 1000 Nm. It powers the S65 AMG in W220 and W221 form, the CL65 AMG in C215 and C216 form, and the SL65 AMG R230. The engine itself is strong when maintained; most workshop visits come from carbon-clogged turbo oil drains that let the shaft seals push oil into the intake and intercoolers, timing chain stretch announced by a cold-start rattle, and stressed Active Body Control pumps and high-pressure lines. The sheer torque also wears mounts, driveshaft joints and transmission parts faster than usual. This page covers torque figures for the main bearing caps, cylinder head, turbo oil feed banjo, spark plugs, oil drain plug and wheel bolts, plus service intervals and special tools.
Oil in the intake or intercoolers usually traces back to the turbo oil drains, so pull the drain hoses and check them for carbon before condemning a turbo. A cold-start rattle points to primary chain stretch and should be confirmed against cam timing deviation. Chassis complaints on these cars are more often the ABC hydraulics than the engine, so pressure-test the system and inspect the lines for cracking.
Check first
- Turbo oil drain hoses blown through with compressed air; any carbon restriction needs cleaning straight away.
- Oil grade: MB 229.5 0W-40 only, changed every 7500 km.
- Cold-start rattle as an early sign of primary timing chain stretch.
- ABC pump and high-pressure lines for cracking; ABC fluid renewed every 3 years.
- Engine and transmission mounts and driveshaft joints, which wear quickly under this torque.
Engine overview
Vehicles with this engine
Known failures & weak points
Common torque specifications
| Main Bearing Caps Nm | 30 Nm + 90° — TTY, replace bolts (single-use) unconfirmed |
|---|---|
| Cylinder Head Nm | 55 Nm + 90° + 90° — TTY, replace bolts (single-use) unconfirmed |
| Turbo Oil Feed Banjo Nm | 22 unconfirmed |
| Spark Plugs Nm | 25 unconfirmed |
| Oil Drain Plug Nm | 30 unconfirmed |
| Wheel Bolts Nm | 130 unconfirmed |
Figures marked unconfirmed could not be cross-checked against a workshop source. Verify against the vehicle’s own documentation before tightening.
Service intervals
| Oil Change Km | 7500 |
|---|---|
| Oil Spec | 0W-40 MB 229.5 AMG specification |
| Oil Capacity L | 10.5 |
| Spark Plugs Km | 50000 |
| Coolant Years | 3 |
| Abc Fluid Years | 3 |
| Air Filter Km | 20000 |
Special tools
- XENTRY with AMG M275 full module — mandatory for injector adaptation and ABC calibration
- Mercedes 111 589 00 40 00 — V12 TDC tool
- ABC pressure test kit 230 589 00 21 00
- High-pressure fuel system test adapter (1800 bar rated)
- Turbo boost leak tester with V12 intake adapter
Pro tips from the field
Got a M275 problem? Ask for free.
Describe the symptoms — TorqFix replies with a diagnosis cited from verified workshop data.
Get free diagnosis →Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com
The story behind TorqFix →Workshop data on this page last updated 22 Aug 2026.