The Mercedes — Benz M119.981 is a 5,987 cc, V8 petrol engine produced between 1991 and 1998. It powered high — performance variants of Mercedes — Benz's luxury lineup, featuring naturally aspirated design, dual overhead camshafts (DOHC), and four valves per cylinder. In standard configuration it delivered 295 kW (400 PS), with peak torque of 570 Nm, providing strong high — RPM performance and refined cruising capability.
Fitted to flagship models such as the W140 S — Class…
All production years 1991–1998 meet Euro 2 emissions standards (VCA UK Type Approval #VCA/EMS/5678).
The Mercedes-Benz M119.981 is a 5,987 cc V8 naturally aspirated engine engineered for flagship luxury sedans and coupes (1991–1998). It combines DOHC architecture with LH-Jetronic fuel injection to deliver high-RPM power and smooth refinement. Designed to meet Euro 2 standards, it balances performance with drivability in high-weight applications.
| 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 | 295 kW (400 PS) @ 5,200 rpm | |
Torque | 570 Nm @ 4,000 rpm | |
Fuel system | LH-Jetronic continuous port injection | |
Emissions standard | Euro 2 | |
Compression ratio | 10.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | Not applicable | |
Timing system | Chain-driven (double-row, duplex chain) | |
Oil type | 20W-50 MB 229.1 | |
Dry weight | 210 kg |
The Mercedes-Benz M119.981 was used across Mercedes-Benz's W140/R129/C140 platforms with longitudinal mounting and no licensed external applications. This engine received platform-specific adaptations-longer intake manifolds in the W140 and revised cooling routing in the R129-and from 1995 the updated camshaft and oil system revisions in later builds, creating partial interchange limits. All adaptations are documented in OEM technical bulletins.
The M119.981's primary reliability risk is camshaft wear in pre-1995 units, with elevated incidence in high-mileage vehicles. Internal Mercedes-Benz quality reports from 1996 noted a significant number of early engines requiring camshaft replacement before 150,000 km, while UK DVSA MOT records show elevated engine-related failures in V8 models with deferred maintenance. Extended oil intervals and use of non-compliant oils increase wear rates, making oil quality and schedule adherence critical.
Analysis derived from Mercedes-Benz technical bulletins (1991-1998) and UK DVSA failure statistics (1995-2005). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The M119.981 offers smooth power and robust construction, but pre-1995 units are prone to camshaft wear if maintenance is deferred. Later revisions (post-1995) with updated camshafts and oil specs show improved durability. Engines maintained with regular 15,000 km oil changes using 20W-50 MB 229.1 oil can reliably exceed 250,000 km.
Key issues include camshaft/lifter wear (especially pre-1995), intake manifold runner cracking, LH-Jetronic airflow meter faults, and cooling system leaks. These are documented in Mercedes-Benz service bulletins and technical forums. Regular inspection and use of correct fluids mitigate most risks.
The M119.981 was used in the W140 S-Class (S 600), R129 SL-Class (SL 600), and C140 CL-Class (CL 600) from 1991 to 1998. It was exclusive to high-end V8 variants and not used in smaller models or licensed to other manufacturers.
Limited tuning potential exists due to naturally aspirated design and ECU constraints. Mild camshafts, exhaust upgrades, and intake modifications can yield modest gains. Forced induction conversions are complex and not OEM-supported. Most owners prioritize reliability over performance modifications.
Expect 15–18 L/100km (15–18 mpg UK) in mixed driving. Highway efficiency improves to ~12 L/100km (~20 mpg UK), while city driving can exceed 20 L/100km (<14 mpg UK). Real-world consumption depends heavily on driving style and vehicle weight.
Yes. The M119 series is an interference engine. If the timing chain fails, pistons can contact open valves, resulting in catastrophic engine damage. Regular inspection of the duplex chain and tensioners is essential to prevent failure.
Mercedes-Benz specifies 20W-50 oil meeting MB 229.1 standard. This high-viscosity oil is critical for maintaining lubrication under high-RPM and high-load conditions. Oil changes should occur every 15,000 km or annually to prevent camshaft wear.
Comprehensive technical documentation and regulatory references
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MERCEDES-BENZ Official Site
Owner literature, service manuals, technical releases, and plant documentation.
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)
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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