The Mercedes — Benz M113.986 is a 6,208 cc, V8 petrol engine produced between 2004 and 2006. It forms part of the M113 engine family, featuring a 90 — degree V configuration, dual overhead camshafts (DOHC), and three valves per cylinder (2 intake, 1 exhaust). Equipped with sequential multi — point fuel injection and an EZL ignition system, it delivers 350 kW (476 PS) at 6,100 rpm and 610 Nm of torque at 5,200 rpm, designed for high — performance AMG applications.
Fitted exclusiv…
Production years 2004–2006 comply with Euro 4 standards (VCA UK Type Approval #VCA/EMS/8903).
The Mercedes-Benz M113.986 is a 6,208 cc V8 petrol engine engineered for high-performance AMG platforms (2004–2006). It combines DOHC 24-valve architecture with sequential fuel injection to deliver track-focused performance and linear power delivery. Designed to meet Euro 4 emissions standards, it prioritizes mechanical reliability and high-RPM capability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 6,208 cc | |
Fuel type | Petrol (Unleaded, 98 RON min) | |
Configuration | V8, DOHC, 24-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 102.0 mm × 95.0 mm | |
Power output | 350 kW (476 PS) @ 6,100 rpm | |
Torque | 610 Nm @ 5,200 rpm | |
Fuel system | Sequential multi-point fuel injection | |
Emissions standard | Euro 4 | |
Compression ratio | 11.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | Not applicable | |
Timing system | Timing chain (double-row, non-interference) | |
Oil type | 229.5 specification (SAE 10W-60) | |
Dry weight | 235 kg |
The Mercedes-Benz M113.986 was used across Mercedes-Benz's W211/C215 platforms with longitudinal mounting in rear-wheel-drive applications. This engine received platform-specific adaptations—revised intake manifolds in the W211 and shorter exhaust manifolds in the C215—and from 2005 the facelifted W211 models adopted updated lambda control, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The M113.986's primary reliability risk is intake camshaft lobe wear on early builds, with elevated incidence in high-mileage urban use. Internal Mercedes quality reports from 2004 indicated a notable share of pre-2005 engines showing lobe degradation before 150,000 km, while UK DVSA records show increased catalytic converter failures in vehicles with delayed lambda sensor servicing. Extended oil intervals and low-RON fuel exacerbate wear and knock risk, making oil quality and fuel specification adherence critical.
Analysis derived from Mercedes-Benz technical bulletins (2004-2006) and UK DVSA failure statistics (2004-2007). Repair procedures should follow manufacturer guidelines.
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The M113.986 is mechanically robust with good longevity when maintained properly. Early models (2004–2005) are prone to camshaft lobe wear if oil changes are delayed or incorrect oil is used. Later units (post-2005) feature improved camshaft hardening, enhancing durability. Regular servicing with MB 229.5 oil and timely lambda sensor replacement ensure reliable long-term operation.
The main issues are intake camshaft lobe wear (especially pre-2005), lambda sensor failure, throttle body carbon buildup, and coolant leaks from the thermostat housing. These are documented in Mercedes service bulletins and field reports. Using correct oil and adhering to service intervals significantly reduces failure rates.
This 6.2L petrol V8 engine was used in the E-Class (W211 E 55 AMG) and CL-Class (C215 CL 55 AMG). It was phased out by 2006 and replaced by the M156 engine family. All applications were rear-wheel-drive with longitudinal engine mounting.
Limited tuning potential exists. ECU remapping can yield modest gains (~20-30 PS) by optimizing ignition and fuel maps, but the naturally aspirated design and compression ratio limit output. Aftermarket intake and exhaust systems offer minor improvements. Significant power increases require internal modifications, which are uncommon due to the engine's age and design constraints.
In combined driving, the M113.986 achieves approximately 15.5–17.5 L/100km (18–16 mpg UK). Urban consumption ranges from 19.0–23.0 L/100km, while highway efficiency can reach 12.0 L/100km. Real-world figures depend on driving style and vehicle weight, with the W211 E-Class being the most efficient application.
No. The M113.986 is a non-interference engine. If the timing chain fails or skips, the pistons will not contact the valves, preventing catastrophic internal damage. However, the engine will stop running, so chain inspection during major services is still recommended.
Mercedes specifies SAE 10W-60 oil meeting MB 229.5 standard. This high-shear-stability oil ensures proper lubrication of the camshaft and valvetrain. Change intervals should not exceed 15,000 km or one year. Using non-specification oil increases the risk of cam lobe wear, especially in pre-2005 engines.
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Regulation (EC) No 715/2007
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