642.975 engine — Mercedes-Benz 3.0 CDI (3L)
3L · 184 hp
Engine overview
Vehicles with this engine
Factory specifications
Values from the manufacturer documentation for this engine.
Engine (general)
| Engine code | 642.975 |
| Capacity | 2987 cc |
| Normal | 27.0 - 32.0 bar |
| Differential limit between cylinders | 3.0 bar |
Electrical
| Alternator | 180 A |
| Alternator | 100 A |
Capacities
| Engine sump, incl. filter | 8.5 l |
| Automatic transmission | 722.637 |
| Initial filling | 7.9 l |
| Automatic transmission | 722.638 |
| Initial filling | 8.0 l |
| Transfer box | 2.0 l |
| Transfer box | 2.2 l |
| Differential, 4WD front | 1.4 l |
| Differential, 4WD rear | 1.8 l |
| Cooling system | 12.0 l |
| Cooling system | 12.6 l |
| Air-conditioner refrigerant | 1080 g |
| Air-conditioner compressor oil | 170 ml |
Torque settings
| Cylinder head bolts — Stage 1 | 10 Nm |
| Cylinder head bolts — Stage 2 | 60 Nm |
| Cylinder head bolts — Stage 3 | 90 ° |
| Cylinder head bolts — Stage 4 | 90 ° |
| Cylinder head bolts — Stage 5 | 90 ° |
| Cylinder head (M8 bolts) — Stage 1 | 20 Nm |
| Main bearing cap — Stage 1 | 35 Nm |
| Main bearing cap — Stage 2 | 95 ° |
| Main bearing cap — Stage 3 | 95 ° |
| Side bolt of main bearing cap — Stage 1 | 53 Nm |
| Side bolt of main bearing cap — Stage 2 | 95 ° |
| Big-end bearing cap — Stage 1 | 15 Nm |
| Big-end bearing cap — Stage 2 | 20 Nm |
| Big-end bearing cap — Stage 3 | 30 Nm |
| Big-end bearing cap — Stage 4 | 40 Nm |
| Big-end bearing cap — Stage 5 | 40 Nm |
| Big-end bearing cap — Stage 6 | 90 ° |
| Big-end bearing cap — Stage 7 | 90 ° |
| Big-end bearing cap — Stage 8 | 90 ° |
| Big-end bearing cap — Stage 9 | 90 ° |
| Wheel bolts | 180 Nm |
| Wheel bolts | 130 Nm |
Workshop procedures for this engine
Step-by-step procedures from the workshop database.
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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.
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The story behind TorqFix →Workshop data on this page last updated 22 Aug 2026.