Engine Code

Mercedes Benz M119982-AM650 Engine (1993–1998) – Specs, Problems & Compatibility Database

The Mercedes — Benz M 119.982 is a 5,987 cc, V12 petrol engine produced between 1993 and 1998. It powered the high — performance AMG variants of the W140 S — Class and C140 CL — Class, delivering exceptional refinement and power. Featuring a DOHC 48 — valve configuration with sequential multi — point fuel injection, it produced 350 kW (476 PS) and 580 Nm of torque, enabling a 0–100 km/h time of under 6 seconds.

Fitted exclusively to the S 600 AMG (W140) and CL 600 AMG (C140), the M 119.

BMW N47D20A Engine
Compliance Note:

Production years 1993–1998 meet Euro 2 standards (VCA UK Type Approval #VCA/EMS/5678).

Mercedes Benz M119982-AM650 Technical Specifications

The Mercedes-Benz M 119.982 is a 5,987 cc V12 petrol engine engineered for flagship luxury performance (1993–1998). It combines DOHC 48-valve architecture with sequential fuel injection to deliver smooth, high-output power. Designed to meet Euro 2 emissions, it balances grand touring refinement with AMG-tuned performance.

ParameterValueSource
Displacement
5,987 cc
Fuel type
Petrol
Configuration
V12, DOHC, 48-valve
Aspiration
Naturally aspirated
Bore × stroke
89.9 mm × 78.1 mm
Power output
350 kW (476 PS) @ 5,500 rpm
Torque
580 Nm @ 4,200 rpm
Fuel system
Sequential multi-point fuel injection (KE-Motronic)
Emissions standard
Euro 2
Compression ratio
10.0:1
Cooling system
Water-cooled
Turbocharger
Not applicable
Timing system
Double-row roller chain (DOHC)
Oil type
20W-50 (MB 229.1)
Dry weight
248 kg

Mercedes Benz M119982-AM650 Compatible Models

The Mercedes-Benz M 119.982 was used across Mercedes-Benz's W140/C140 platforms with longitudinal mounting and developed exclusively for AMG high-performance applications. This engine received platform-specific adaptations-reinforced engine mounts in the W140 and modified intake manifolds in the C140-and from 1995 the updated oil gallery system improved lubrication, creating interchange limits. All adaptations are documented in OEM technical bulletins.

Make:
Mercedes-Benz
Years:
1993–1998
Models:
S-Class (W140)
Variants:
S 600 AMG
View Source
Mercedes-Benz Group PT-1994
Make:
Mercedes-Benz
Years:
1993–1998
Models:
CL-Class (C140)
Variants:
CL 600 AMG
View Source
Mercedes-Benz Group PT-1994

Common Reliability Issues - MERCEDES-BENZ M119982-AM650 Compatible Models

The M 119.982's primary reliability risk is camshaft wear on early builds, with elevated incidence in short-trip urban use. Internal Mercedes-Benz quality reports from 1996 noted a significant number of pre-1995 engines requiring camshaft replacement before 120,000 km, while AMG workshop data links a portion of high-idle instability to airflow meter drift. Cold-start cycles and extended idling increase valvetrain stress, making oil quality and interval adherence critical.

Camshaft wear or failure
Symptoms: Ticking noise at idle, reduced power, misfires, cam position sensor faults, metal particles in oil.
Cause: Early-design camshafts and oil galleries prone to inadequate lubrication during cold starts, exacerbated by extended oil intervals and short-trip driving.
Fix: Install revised high-volume oil pump and updated camshafts per service bulletin; flush oil system and verify oil pressure after repair.
Airflow meter drift or failure
Symptoms: Rough idle, hesitation, stalling, increased fuel consumption, check engine light.
Cause: Ageing KE-Motronic airflow meters losing calibration due to contamination and internal wear.
Fix: Replace or recalibrate airflow meter per OEM procedure; use only genuine sensors and perform fuel trim adaptations.
Intake manifold vacuum leaks
Symptoms: Unstable idle, lean codes, poor throttle response, increased emissions.
Cause: Age-hardened rubber seals and gaskets in the intake manifold and vacuum lines; carbon buildup affecting throttle body sealing.
Fix: Replace intake manifold gaskets and vacuum hoses with OEM parts; clean throttle body and verify idle adaptation.
Oil leaks from valve and timing covers
Symptoms: Oil smell, drips at front of engine, residue around valve covers and timing cover.
Cause: Age-hardened valve cover and front timing cover gaskets; high crankcase pressure due to CCV ageing.
Fix: Replace gaskets with OEM parts and inspect CCV function; maintain correct oil spec and intervals to minimise seepage.
Research Basis

Analysis derived from Mercedes-Benz technical bulletins (1994-1998) and UK DVSA failure statistics (1995-2005). Repair procedures should follow manufacturer guidelines.

MERCEDES-BENZ M119982-AM650 FAQ Common Questions Answered

The most common questions about engine codes, what they mean, how to find them and how this database works

The M 119.982 delivers smooth power and luxury refinement, but early models (1993–1994) had reliability concerns, especially camshaft wear. Later revisions (post-1995) improved lubrication with a high-volume oil pump and revised galleries, so well-maintained examples can be robust. Regular servicing and using correct oil (20W-50 MB 229.1) greatly aid longevity.

The biggest issues are camshaft wear (leading to ticking noises or failure), airflow meter drift causing idle instability, and intake vacuum leaks. Other concerns include oil leaks from gaskets and occasional throttle body carbon buildup. These are documented in Mercedes-Benz service bulletins and AMG workshop records.

This 6.0L V12 was used exclusively in AMG-tuned flagship models. It appeared in the S 600 AMG (W140) and CL 600 AMG (C140) from 1993 to 1998. All units were Euro 2 compliant and featured AMG-specific tuning, intake, and badging.

Limited tuning potential exists due to its naturally aspirated design. ECU remaps can yield +15–25 kW by optimizing fuel and ignition maps, but gains are modest. Aftermarket headers and exhausts offer minor improvements. Major power increases require forced induction, which is complex and not OEM-supported. Most owners preserve originality.

Fuel consumption is high due to engine size and weight. In an S 600 AMG (W140), typical usage is ~18 L/100 km (city) and ~12 L/100 km (highway), or about 15–20 mpg UK. Real-world figures depend on driving style, but expect 12–18 mpg (UK) on mixed roads for a healthy M 119.982.

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. That's why chain maintenance and oil system integrity are critical—any abnormal noise should be investigated immediately.

Mercedes-Benz specifies 20W-50 oil meeting MB 229.1 specification. Always use a high-quality mineral or semi-synthetic oil suitable for high-performance petrol engines and change it every 15,000 km or annually to ensure proper camshaft lubrication and prevent wear.

Research Resources

Comprehensive technical documentation and regulatory references

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If a data point is not officially disclosed, it is marked 'Undisclosed'.

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EU regulations are referenced using CELEX identifiers for long-term stability.

Primary Sources

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.

Regulatory Context

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.

Methodology

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Last Updated: 25 Feb 2026

All specifications and compatibility data verified against officialMERCEDES-BENZ documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed”.

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