113.988 engine — Mercedes-Benz 5.4 (5.4L)
5.4L · 367 hp
Engine overview
Vehicles with this engine
Factory specifications
Values from the manufacturer documentation for this engine.
Engine (general)
| Engine code | 113.988 |
| Capacity | 5439 cc |
| Normal | 9.0 - 12.0 bar |
| Minimum | 8.0 bar |
| Differential limit between cylinders | 1.5 bar |
| Oil pressure | > 0.7 / 700 > 3.0 / 3000 bar/rpm |
Engine (petrol)
| Fuel system (make and type) | ME-SFI |
| Number of cylinders | 8 |
| Firing order | 1-5-4-2-6-3-7-8 |
| Spark plug gap | 0.8 mm |
| Lambda | 0.97 – 1.03 |
| CO at fast-idle speed | < 0.3 % |
Cooling system
| Cap pressure | 1.4 ± 0.1 bar |
Electrical
| Alternator | 150 A |
Capacities
| Engine sump, incl. filter | 8.5 l |
| Automatic transmission | 722.636 |
| Initial filling | 8.6 (+ 0.5) l |
| Differential | 1.2 l |
| Cooling system | 11.5 l |
| Air-conditioner refrigerant | 850 g |
| Air-conditioner compressor oil | 120 ml |
Torque settings
| Cylinder head bolts — Stage 1 | 10 Nm |
| Cylinder head bolts — Stage 2 | 30 Nm |
| Cylinder head bolts — Stage 3 | 90 ° |
| Cylinder head bolts — Stage 4 | 90 ° |
| Cylinder head bolts — Stage 1 | 20 Nm |
| Spark plugs | 25 Nm |
| Oxygen sensor | 50 Nm |
| Main bearing cap — Stage 1 | 20 Nm |
| Main bearing cap — Stage 2 | 90 ° |
| Main bearing cap — Stage 1 | 30 Nm |
| Side bolt of main bearing cap | 30 Nm |
| Big-end bearing cap — Stage 1 | 5 Nm |
| Big-end bearing cap — Stage 2 | 25 Nm |
| Big-end bearing cap — Stage 3 | 90 ° |
| Automatic transmission drain plug | 20 Nm |
| Wheel bolts | 110 Nm |
| Rear hub | 220 Nm |
Emissions
| Emission code | 70/220*2002/80B |
| Emission standard | Euro 4 |
| CO2 average | 286 g/km |
| CO | 0.366 g/km |
| HC | 0.026 g/km |
| NOx | 0.011 g/km |
| CO2 average | 293 g/km |
Workshop procedures for this engine
Step-by-step procedures from the workshop database.
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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.
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The story behind TorqFix →Workshop data on this page last updated 22 Aug 2026.