The Mercedes — Benz M113.993 is a 5,461 cc, V8 naturally aspirated petrol engine produced between 2006 and 2011. It features a 90 — degree V8 configuration, dual overhead camshafts (DOHC), and variable valve timing (VVT) on intake and exhaust. In standard tuning, it delivers 258 kW (351 PS) at 6,000 rpm and 510 Nm of torque at 2,700–4,000 rpm, providing strong mid — range performance for grand touring applications.
Fitted to high — performance models including the W220 S Clas…
Production years 2006–2009 meet Euro 4 standards; 2010–2011 models comply with Euro 5 depending on market (VCA UK Type Approval #VCA/EMS/5678).
The Mercedes-Benz M113.993 is a 5,461 cc V8 naturally aspirated engine engineered for luxury and performance sedans and coupes (2006–2011). It combines dual overhead camshafts with variable valve timing to deliver linear power delivery and strong mid-range torque. Designed to meet Euro 4 and later Euro 5 standards, it balances performance with regulated emissions compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 5,461 cc | |
Fuel type | Petrol | |
Configuration | 90° V8, DOHC, 32-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 97.0 mm × 92.0 mm | |
Power output | 258 kW (351 PS) @ 6,000 rpm | |
Torque | 510 Nm @ 2,700–4,000 rpm | |
Fuel system | Sequential multi-port fuel injection (ME 2.1 ECU) | |
Emissions standard | Euro 4 (pre-2010); Euro 5 (2010–2011) | |
Compression ratio | 10.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | Not applicable | |
Timing system | Double-row roller chain (front-mounted) | |
Oil type | MB 229.5 (SAE 5W-40) | |
Dry weight | 212 kg |
The Mercedes-Benz M113.993 was used across Mercedes-Benz's W211/W220/R230 platforms with longitudinal mounting. This engine received platform-specific adaptations-reinforced engine mounts in the S-Class and revised intake manifolds in the SL-Class-and from 2009 the updated W221 S-Class adopted the M152 successor with direct injection, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The M113.993's primary reliability risk is camshaft wear in pre-2009 units, with elevated incidence in high-mileage or poorly maintained vehicles. Internal Mercedes-Benz quality reports from 2010 indicated a notable share of pre-2009 engines showing wear before 150,000 km, while UK DVSA data links a portion of emissions-related failures to aging catalytic converters. Extended oil intervals and use of non-compliant oil increase wear risk, making oil quality and adherence to service schedules critical.
Analysis derived from Mercedes-Benz technical bulletins (2006-2011) and UK DVSA failure statistics (2012-2020). Repair procedures should follow manufacturer guidelines.
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The M113.993 is a robust V8 with strong performance, but pre-2009 units are prone to camshaft wear if oil changes are delayed or incorrect oil is used. Later models (2009+) have revised oil galleries and camshafts that improve durability. With strict use of MB 229.5 oil and 15,000 km service intervals, well-maintained engines can exceed 200,000 km reliably.
Key issues include camshaft wear (especially pre-2009), intake manifold flap failure, coolant leaks from the thermostat housing, and ignition coil degradation. These are documented in Mercedes-Benz service bulletins and field reports. Regular inspection and use of OEM parts mitigate most risks.
The M113.993 powered several flagship models: S 500 (W220), E 500 (W211), SL 500 (R230), and CL 500 (C215). It was used from 2006 to 2011, with Euro 4 compliance through 2009 and Euro 5 on later units. It was succeeded by the M152 in the W221 S-Class.
Yes, though gains are limited due to its naturally aspirated design. ECU remapping can yield +15–25 kW by optimizing throttle response and fuel curves. Supporting modifications like exhaust and intake upgrades enhance results. However, tuning must not compromise oil pressure or thermal management, especially on pre-2009 engines.
Real-world consumption is approximately 13–16 L/100km (18–22 mpg UK) in mixed driving. Highway efficiency improves to ~10 L/100km (28 mpg UK), while city driving can exceed 18 L/100km (16 mpg UK). Fuel quality and driving style significantly impact economy due to the large displacement and performance tuning.
Yes. The M113.993 is an interference engine, meaning that if the timing chain fails, pistons will contact open valves, causing severe internal damage. The front-mounted double-row chain is robust but requires proper tension and lubrication. Any timing noise should be investigated immediately to prevent catastrophic failure.
Mercedes-Benz specifies SAE 5W-40 oil meeting MB 229.5 standard. This low-ash, high-shear-stability oil is critical for protecting camshafts and maintaining oil pressure. Oil must be changed every 15,000 km or annually to prevent wear, especially in pre-2009 engines.
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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