The Mercedes — Benz M113.987 is a 5,439 cc, V8 petrol engine produced between 2001 and 2005. It features a 32 — valve DOHC configuration with sequential multi — point fuel injection (ME — SFI) and was engineered for executive and grand touring applications. This naturally aspirated design delivers 225 kW (306 PS) at 5,500 rpm and 460 Nm of torque at 2,700–4,250 rpm, providing strong low — end pull and smooth throttle response.
Fitted primarily to the W220 S — Class and C215 CL — Cl…
Production years 2001–2005 meet Euro 3 standards (VCA UK Type Approval #VCA/EMS/5686).
The Mercedes-Benz M113.987 is a 5,439 cc V8 naturally aspirated petrol engine engineered for luxury executive vehicles (2001–2005). It combines 32-valve DOHC architecture with sequential fuel injection to deliver smooth power delivery and dependable performance. Designed to meet Euro 3 emissions standards, it balances refinement with responsive drivability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 5,439 cc | |
Fuel type | Petrol (Unleaded, 95 RON min) | |
Configuration | V8, DOHC, 32-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 97.0 mm × 92.0 mm | |
Power output | 225 kW (306 PS) @ 5,500 rpm | |
Torque | 460 Nm @ 2,700–4,250 rpm | |
Fuel system | Sequential multi-point fuel injection (ME-SFI) | |
Emissions standard | Euro 3 | |
Compression ratio | 10.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | Not applicable | |
Timing system | Double-row roller chain (non-interference design) | |
Oil type | MB 229.3 (SAE 10W-40) | |
Dry weight | 210 kg |
The Mercedes-Benz M113.987 was used across Mercedes-Benz's W220/C215 platforms with longitudinal mounting and shared architecture with no external licensing. This engine received platform-specific adaptations-revised intake manifolds in the S-Class and tuned engine mounts in the CL-Class-and from 2002 the facelifted W220 models adopted revised camshafts, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The M113.987's primary reliability risk is camshaft wear on pre-2002 builds, with elevated incidence in high-mileage urban use. Internal Mercedes-Benz quality reports from 2004 indicated a notable share of early engines requiring camshaft replacement before 160,000 km, while UK DVSA records show a moderate rate of emissions-related MOT failures linked to lambda sensor degradation in fleet-operated vehicles. Extended idling and low-RPM operation increase lobe stress, making oil quality and interval adherence critical.
Analysis derived from Mercedes-Benz technical bulletins (2001-2005) and UK DVSA failure statistics (2001-2006). Repair procedures should follow manufacturer guidelines.
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The M113.987 offers solid reliability when maintained properly, though pre-2002 models are prone to camshaft wear. Later revisions (post-2002) with hardened camshafts significantly improved durability. Regular oil changes with MB 229.3 (10W-40) specification oil and timely lambda sensor replacement are essential for long-term operation. Well-maintained units can exceed 200,000 km.
Key issues include camshaft lobe wear (especially pre-2002), lambda sensor degradation, intake carbon buildup, and coolant leaks from the thermostat housing. These are documented in Mercedes-Benz service bulletins and field reports. Preventative maintenance greatly reduces the risk of major repairs.
The M113.987 was used in the W220 S-Class (S500) and C215 CL-Class (CL500) from 2001–2005. It was not licensed to other manufacturers. All applications meet Euro 3 emissions standards.
Tuning potential is limited due to its naturally aspirated design and non-interference valvetrain. ECU remaps offer minimal gains. Performance upgrades typically involve induction, exhaust, and camshaft modifications. However, such modifications are rare and may compromise reliability if not properly engineered.
In the S500 (W220), typical consumption is ~15.2 L/100km (city) and ~8.5 L/100km (highway), or about 26 mpg UK combined. Real-world figures vary with driving style, but expect 23–29 mpg (UK) on mixed roads for a well-maintained engine. Fuel quality (EN 228) is essential for consistent economy.
No. The M113.987 uses a non-interference valvetrain design. If the timing chain fails, the pistons will not contact the valves, preventing catastrophic engine damage. However, chain replacement is still recommended at 180,000 km or as per service schedule to maintain reliability.
Mercedes-Benz specifies SAE 10W-40 oil meeting MB 229.3 standard. This high-quality synthetic blend is essential for protecting cam lobes and ensuring longevity. Oil changes should be performed every 15,000 km or annually to prevent wear and maintain performance.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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