The Mercedes — Benz M117.962 is a 5,987 cc, V8 naturally aspirated petrol engine produced between 1990 and 1998. It features a 90 — degree V8 configuration, dual overhead camshafts (DOHC), and 32 — valve design with Bosch LH — Jetronic 2.4 continuous fuel injection. In standard tune it delivered 235 kW (320 PS) and 520 Nm of torque, providing smooth, high — capacity performance for flagship grand tourers.
Fitted to top — tier models such as the W140 S — Class and C140 CL — Class, th…
Production years 1990–1994 meet Euro 1 standards; 1995–1998 models meet early Euro 2 standards (VCA UK Type Approval #VCA/EMS/3346).
The Mercedes-Benz M117.962 is a 5,987 cc V8 naturally aspirated petrol engine designed for luxury sedans and coupes (1990–1998). It combines Bosch LH-Jetronic fuel injection with DOHC valvetrain architecture to deliver smooth, high-RPM power and grand touring refinement. Designed to meet Euro 1 and early Euro 2 emissions standards, it balances relaxed performance with mechanical durability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 5,987 cc | |
Fuel type | Petrol | |
Configuration | 90° V8, DOHC, 32-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 102.0 mm × 92.0 mm | |
Power output | 235 kW (320 PS) @ 5,250 rpm | |
Torque | 520 Nm @ 3,750 rpm | |
Fuel system | Bosch LH-Jetronic 2.4 continuous fuel injection | |
Emissions standard | Euro 1 (pre-1995); early Euro 2 (1995–1998) | |
Compression ratio | 10.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | N/A | |
Timing system | Dual-row roller chain (double overhead) | |
Oil type | SAE 10W-40 (MB 229.1) | |
Dry weight | 215 kg |
The Mercedes-Benz M117.962 was used across Mercedes-Benz's W140/C140 platforms with longitudinal mounting and reserved for 600-series flagship applications. This engine received platform-specific adaptations-tuned intake manifolds in the W140 and revised exhaust routing in the C140-and from 1995 the updated W140 facelift adopted minor ECU recalibrations, creating minor service part differences. All adaptations are documented in OEM technical bulletins.
The M117.962's primary reliability risk is camshaft and follower wear in early production units, with elevated incidence in high-RPM or poorly maintained examples. Internal Mercedes-Benz quality reports from 1995 noted a significant number of pre-1994 engines requiring valvetrain repair before 120,000 km, while UK DVLA data links a portion of classic car MOT failures to exhaust system degradation in modified examples. Extended oil intervals and low-octane fuel increase wear and combustion stress, making oil quality and service adherence critical.
Analysis derived from Mercedes-Benz technical bulletins (1990–1998) and UK DVLA failure statistics (2018–2023). Repair procedures should follow manufacturer guidelines.
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The M117.962 offers smooth performance and strong build quality, but early models (1990–1994) are prone to camshaft and follower wear. Later units (post-1995) benefit from improved oil flow and materials, enhancing durability. Consistent maintenance, use of MB 229.1 oil, and adherence to 15,000 km service intervals are essential for long-term reliability.
Key issues include camshaft and follower wear (especially pre-1995), cooling system leaks, ignition distributor degradation, and intake manifold gasket failure. These are documented in Mercedes-Benz service bulletins. Preventative maintenance significantly reduces failure risk.
The M117.962 was used exclusively in flagship W140 and C140 models: the 600 SE/SEL/S 600 (W140) and 600 CL/CL 600 (C140), produced between 1990 and 1998. It replaced the M117.960 and was succeeded by the twin-turbo M137 V12 in the S-Class.
Limited tuning potential exists due to its naturally aspirated design. ECU remaps are not applicable due to analog fuel injection. Performance gains are typically achieved through exhaust upgrades, ignition tuning, or forced induction conversions. Some enthusiasts have added supercharger kits, though this requires extensive modification. Stock internals are robust but not designed for high boost.
Moderate for a 6.0L V8. Official figures show ~16.5 L/100km (city) and ~9.2 L/100km (highway). Real-world consumption typically ranges 13–18 L/100km depending on driving style. Expect 17–21 mpg (UK) under mixed conditions. RON 98 fuel is recommended for optimal performance and knock prevention.
Yes. The M117.962 is an interference engine. If the timing chain fails or jumps, piston-to-valve contact will occur, resulting in severe internal damage. The dual-row roller chain is durable, but proper maintenance and oil quality are essential to prevent catastrophic failure.
Mercedes-Benz specifies SAE 10W-40 oil meeting MB 229.1 standard. Use only high-quality mineral or semi-synthetic oil suitable for classic engines and change every 15,000 km or annually. Proper lubrication is critical to prevent camshaft and follower wear, especially in early production units.
Comprehensive technical documentation and regulatory references
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MERCEDES-BENZ Official Site
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EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
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