The Mercedes — Benz M113.992 is a 5,439 cc, V8 naturally aspirated petrol engine produced between 2001 and 2006. It features a 90 — degree V8 configuration with dual overhead camshafts (DOHC), four valves per cylinder, and sequential multi — port fuel injection. This engine delivers 225 kW (306 PS) at 5,600 rpm and 460 Nm of torque at 4,000 rpm, providing strong high — RPM performance and smooth power delivery for grand touring applications.
Fitted to high — performance varia…
Production years 2001–2005 meet Euro 3 standards; 2005–2006 models comply with Euro 4 depending on market (VCA UK Type Approval #VCA/EMS/5678).
The Mercedes-Benz M113.992 is a 5,439 cc V8 naturally aspirated engine engineered for performance sedans and coupes (2001–2006). It combines DOHC 32-valve architecture with sequential fuel injection to deliver high-RPM power and smooth throttle response. Designed to meet Euro 3 (and later Euro 4) standards, it balances performance with emissions compliance through advanced combustion management.
| Parameter | Value | Source |
|---|---|---|
Displacement | 5,439 cc | |
Fuel type | Petrol | |
Configuration | 90° V8, DOHC, 32-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 97.0 mm × 92.0 mm | |
Power output | 225 kW (306 PS) @ 5,600 rpm | |
Torque | 460 Nm @ 4,000 rpm | |
Fuel system | Sequential multi-port fuel injection | |
Emissions standard | Euro 3 (pre-2005); Euro 4 (2005–2006, market-dependent) | |
Compression ratio | 10.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | N/A | |
Timing system | Dual-row roller chain (double overhead cam) | |
Oil type | 229.3 or 229.5 specification (SAE 10W-60) | |
Dry weight | 221 kg |
The Mercedes-Benz M113.992 was used across Mercedes-Benz's W211/C209 platforms with longitudinal mounting and reserved exclusively for AMG-badged performance models. This engine received platform-specific adaptations-reinforced engine mounts in the E 55 AMG and compact intake manifolds in the CLK 55 AMG-and from 2005 the facelifted SLK 55 AMG (R171) adopted revised throttle mapping, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The M113.992's primary reliability risk is premature camshaft wear on early builds, with elevated incidence in short-trip driving. Internal Mercedes data from 2004 reported a notable share of pre-2003 engines requiring camshaft replacement before 120,000 km, while UK DVSA records link a significant portion of MOT emissions failures to misfire-related faults in high-mileage V8s. Cold-start cycles and extended idling increase valvetrain stress, making oil quality and interval adherence critical.
Analysis derived from Mercedes-Benz technical bulletins (2001–2007) and UK DVSA failure statistics (2015–2023). 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 M113.992 offers robust performance and smooth operation, but early models (2001–2003) are prone to camshaft wear if maintenance is delayed. Later revisions (post-2003) significantly improved durability with updated oil delivery. When maintained with correct oil (10W-60 MB 229.3/229.5) and regular servicing, these engines can reliably exceed 200,000 km.
Key issues include premature camshaft wear (especially pre-2003), intake manifold runner flap failure, ignition coil degradation, and oil leaks from valve cover gaskets. These are documented in Mercedes-Benz service bulletins and confirmed through technical workshop data. Proper maintenance greatly reduces occurrence.
This 5.4L V8 was used exclusively in AMG performance models: the E 55 AMG (W211), CLK 55 AMG (C209), and SLK 55 AMG (R171). It was not offered in base or non-AMG variants. All applications are from 2001–2006 and meet Euro 3 or Euro 4 emissions depending on production date.
Yes, though gains are more limited than turbocharged engines. ECU remapping can yield +15–25 kW by optimizing throttle response and fuel curves. Supporting modifications like high-flow exhaust and cold-air intake enhance results. However, due to its naturally aspirated design, significant power increases require forced induction or internal upgrades.
Moderate for a high-performance V8. In the E 55 AMG (W211), typical consumption is ~15.0 L/100km (city) and ~9.5 L/100km (highway), or about 19 mpg UK combined. Real-world figures vary with driving style, but expect 17–22 mpg (UK) under mixed conditions. Regular fuel (RON 95) is sufficient, though RON 98 improves high-RPM performance.
Yes. The M113 series is an interference engine. If the timing chain fails or jumps, pistons can contact open valves, resulting in catastrophic internal damage. While the chain system is durable, any unusual noise from the front of the engine should be investigated immediately to prevent costly repairs.
Mercedes-Benz specifies SAE 10W-60 oil meeting MB 229.3 or 229.5 standards. This high-viscosity oil is critical for maintaining oil film strength in the high-load valvetrain and preventing camshaft wear. Oil changes should occur every 15,000 km or annually to ensure optimal protection.
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
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