The Mercedes — Benz M 119.974 is a 6,000 cc, V8 petrol engine produced between 1991 and 1998. It powered high — performance luxury models in the S — Class, SL, and CL lineups, featuring a DOHC 32 — valve configuration with multi — point fuel injection. This naturally aspirated engine delivered smooth power delivery and high — speed refinement, with output rated at 298 kW (402 PS) and 570 Nm of torque.
Fitted to flagship models including the W140 S 600, R129 SL 600, and C140 CL 600, th…
Production years 1991–1996 meet Euro 2 standards; 1997–1998 models comply with Euro 3 depending on market .
The Mercedes-Benz M 119.974 is a 5,987 cc V8 naturally aspirated engine engineered for flagship luxury vehicles (1991–1998). It combines dual overhead camshafts and 32-valve architecture with sequential multi-point fuel injection to deliver linear power delivery and high-speed refinement. Designed to meet Euro 2 and later Euro 3 emissions standards, it balances performance with drivability in grand touring applications.
| Parameter | Value | Source |
|---|---|---|
Displacement | 5,987 cc | |
Fuel type | Petrol | |
Configuration | 90° V8, DOHC, 32-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 106.0 mm × 84.0 mm | |
Power output | 298 kW (402 PS) @ 5,200 rpm | |
Torque | 570 Nm @ 3,700 rpm | |
Fuel system | Sequential multi-point fuel injection (KE3-Jetronic derivative) | |
Emissions standard | Euro 2 (1991–1996); Euro 3 (1997–1998) | |
Compression ratio | 10.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | Not applicable | |
Timing system | Double roller chain (front-mounted, duplex design) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 218 kg |
The Mercedes-Benz M 119.974 was used across Mercedes-Benz's W140/R129/C140 platforms with longitudinal mounting and no licensed external applications. This engine received platform-specific adaptations-reinforced engine mounts in the W140 and revised intake manifolds in the R129-and from 1996 the facelifted W140 received updated emissions controls, creating interchange limits. All adaptations are documented in OEM technical bulletins.
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The M 119.974 offers smooth performance and robust construction, but early models (1991–1994) are prone to hydraulic lifter wear. Later revisions (post-1995) improved lifter durability with updated materials. When maintained properly—especially with timely oil changes using 20W-50 MB 229.1 oil—these engines can exceed 250,000 km. Regular inspection of intake manifolds and ignition components is advised.
The most documented issues are hydraulic lifter wear (causing ticking noises), intake manifold vacuum leaks, ignition coil failures, and coolant leaks from thermostat housing. These are confirmed in Mercedes-Benz service bulletins. Carbon buildup and fuel injector clogging may occur with poor maintenance. Emissions components like catalytic converters are prone to degradation in short-trip usage.
This 6.0L V8 was used exclusively in flagship models: the W140 S 600 (1991–1998), R129 SL 600 (1993–1998), and C140 CL 600 (1992–1998). It was not used in any smaller platforms or licensed to other manufacturers. All applications featured full-time four-wheel drive or rear-wheel drive with 5G-TRONIC automatic transmission.
Limited tuning potential exists due to naturally aspirated design and ECU constraints. ECU remapping can yield +15–25 kW by optimizing fuel and ignition maps, but gains are modest. Aftermarket upgrades like performance exhaust, high-flow cats, and cold-air intakes offer marginal improvements. Forced induction conversions are complex and not OEM-supported. Stock internals are robust but not designed for significant power increases.
Fuel consumption is high by modern standards. In a W140 S 600, typical usage is ~18.0 L/100km (city) and ~11.0 L/100km (highway), or approximately 15.7 mpg UK combined. Real-world figures depend heavily on driving style, but expect 12–16 mpg (UK) under mixed conditions. The engine requires premium unleaded (RON 98) for optimal performance and knock prevention.
Yes. The M 119 series is an interference engine. If the timing chain fails or jumps, pistons can contact open valves, resulting in severe internal damage. The front-mounted duplex chain is generally robust, but tensioner wear can occur. Any unusual front-end noise should be investigated immediately to prevent catastrophic failure.
Mercedes-Benz specifies 20W-50 oil meeting MB 229.1 standard. This high-viscosity oil ensures proper lifter damping and bearing protection under load. Oil must be changed every 15,000 km or annually to prevent sludge and lifter wear. Using incorrect viscosity or non-compliant oil can accelerate lifter failure and void historical warranty claims.
Comprehensive technical documentation and regulatory references
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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)
UK type-approval authority for automotive products.
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
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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