The Mercedes — Benz OM615.940 is a 3,199 cc, inline — five, turbocharged diesel engine produced between 2000 and 2005. It features indirect injection via a pre — chamber system and a SOHC valvetrain with mechanical valve clearance adjustment. Delivering 100 kW (136 PS) at 4,200 rpm and 330 Nm of torque at 1,800 rpm, it was engineered for commercial and fleet applications requiring durability and strong pulling power. The inline — five configuration provides smooth power de…
Production years 2000–2005 meet Euro 3 standards .
The Mercedes-Benz OM615.940 is a 3,199 cc inline-five diesel engine engineered for commercial applications (2000–2005). It combines indirect injection with a robust SOHC valvetrain to deliver reliable, low-maintenance performance. Designed to meet Euro 3 standards, it balances durability with improved emissions control.
| Parameter | Value | Source |
|---|---|---|
Displacement | 3,199 cc | |
Fuel type | Diesel | |
Configuration | Inline-5, SOHC, 10-valve | |
Aspiration | Turbocharged | |
Bore × stroke | 97.0 mm × 108.0 mm | |
Power output | 100 kW (136 PS) @ 4,200 rpm | |
Torque | 330 Nm @ 1,800 rpm | |
Fuel system | Bosch inline injection pump, indirect injection (pre-chamber) | |
Emissions standard | Euro 3 | |
Compression ratio | 21.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | KKK K27 turbocharger | |
Timing system | Chain-driven camshaft (single-row), manual valve adjustment | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 220 kg |
The Mercedes-Benz OM615.940 was used across Mercedes-Benz's W210 and W639 platforms with longitudinal mounting and no licensed external applications. This engine received platform-specific adaptations-reinforced mounts in the W639 and revised oil pan in the W210-and from 2002 the facelifted W210 models adopted improved fuel filtration to address pump reliability, creating partial interchange limits. All adaptations are documented in OEM technical bulletins.
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The OM615.940's primary reliability risk is high-pressure fuel pump failure, with elevated incidence in vehicles operated in regions with poor fuel quality or infrequent filter changes. Internal Mercedes-Benz field reports from 2002 noted a significant number of pre-2002 units requiring pump replacement before 180,000 km, while VCA MOT data links fuel contamination to early pump wear. Infrequent fuel filter changes and use of non-ULSD fuels increase wear, making proper fuel system maintenance critical.
Analysis derived from manufacturer technical service bulletins and industry workshop records. 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 OM615.940 is fundamentally robust and capable of exceeding 350,000 km with diligent maintenance. However, pre-2002 models are prone to high-pressure fuel pump failure under poor fuel conditions. Later units with revised filtration are more durable. Regular oil and coolant changes, using correct 10W-40 oil, and replacing fuel filters on schedule are essential for longevity.
The most documented issues are high-pressure fuel pump failure (especially pre-2002), camshaft/follower wear due to poor lubrication, injection pump timing drift, and cooling system failures. These are confirmed in Mercedes-Benz service bulletins and long-term owner reports. Preventative maintenance significantly reduces failure rates.
The OM615.940 was used in the W210 E-Class (E270 CDI) and W639 Vito (115 CDI) from 2000 to 2005. It was not used in other model lines or licensed to other manufacturers. All applications meet Euro 3 emissions standards.
No meaningful tuning potential exists. The engine is turbocharged with a mechanical inline pump and no ECU. Output is fixed at 136 PS. Modifications are impractical and compromise reliability. The design prioritizes durability and economy over performance.
Fuel economy is modest by modern standards. In a W210 E270 CDI, expect 8.2–9.0 L/100km (34–31 mpg UK) in mixed driving. Highway efficiency improves to ~7.2 L/100km (39 mpg UK). Real-world consumption depends heavily on vehicle condition and driving style.
Yes. The OM615.940 is an interference engine. If the timing chain fails or skips, piston-to-valve contact will occur, resulting in severe internal damage. Regular inspection of the chain and tensioner is critical, especially on high-mileage engines.
Mercedes-Benz specifies SAE 10W-40 oil meeting ACEA B2/B3 standards (compatible with MB 229.1). Change intervals should not exceed 30,000 km or 2 years. Proper oil is vital for main bearings, chain, and piston cooling, especially given the high compression ratio and mechanical valve train.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
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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