The Mercedes — Benz OM602.961 is a 2,996 cc, inline — five, naturally aspirated diesel engine produced between 1996 and 1998. It features indirect injection via a pre — chamber design and a robust SOHC valvetrain with mechanical tappets. Designed for durability in commercial and fleet applications, it delivers 60 kW (82 PS) at 4,200 rpm and 190 Nm of torque at 2,200 rpm, offering strong low — end pull for urban delivery and light towing.
Fitted exclusively to the T2 609D van, th…
Production years 1996–1998 meet Euro 1 standards . No Euro 2 compliance for this variant.
The Mercedes-Benz OM602.961 is a 2,996 cc inline-five diesel engine designed for light commercial vehicle applications (1996–1998). It utilises indirect injection and a mechanically actuated fuel system to deliver reliable low-end torque and straightforward serviceability. Designed to meet Euro 1 emissions standards, it balances durability with acceptable fuel economy for its era.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,996 cc | |
Fuel type | Diesel | |
Configuration | Inline-5, SOHC, 10-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 92.0 mm × 90.0 mm | |
Power output | 60 kW (82 PS) @ 4,200 rpm | |
Torque | 190 Nm @ 2,200 rpm | |
Fuel system | Bosch M mechanical inline injection pump | |
Emissions standard | Euro 1 | |
Compression ratio | 22.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | None | |
Timing system | Chain-driven camshaft | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 215 kg |
The Mercedes-Benz OM602.961 was used exclusively in Mercedes-Benz's T2 platform with longitudinal mounting. This engine received platform-specific adaptations-reinforced engine mounts for payload stability and revised exhaust manifolds for underfloor clearance-and from 1996, updated cylinder head casting procedures were implemented to address thermal stress concerns, creating minor service part differences. All adaptations are documented in OEM technical bulletins.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
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
Yes, the OM602.961 is fundamentally robust and capable of high mileage when properly maintained. The main concern is cylinder head cracking in pre-1996 units under thermal stress. Avoiding overheating, using correct oil (10W-40 ACEA B2/B3), and regular coolant changes are essential for longevity. Its simple mechanical design contributes to long-term reliability.
The most documented issues are cylinder head cracking (pre-1996), wear in the Bosch M mechanical injection pump, and noisy valve tappets requiring adjustment. Cooling system leaks from the radiator or hoses are also common on high-mileage vehicles. These are addressed in Daimler service documentation and are manageable with preventative maintenance.
The OM602.961 was used exclusively in the Mercedes-Benz T2 (609D) van from 1996 to 1998. It was not used in any passenger car models or licensed to other manufacturers. This engine was specific to the final production phase of the T2 platform.
No, the OM602.961 is not realistically tunable. It is a naturally aspirated engine with a mechanical injection pump not suited to remapping. Power output is fixed, and attempts to modify the pump can lead to poor running or damage. Its design focus is on durability and economy, not performance potential.
Fuel economy is modest by modern standards. In a T2 609D van, expect approximately 9.5–11.0 L/100km (26–29 mpg UK) in mixed urban driving. Highway efficiency can reach ~8.0 L/100km (~35 mpg UK). Real-world figures depend heavily on load and driving conditions, but it was considered economical for commercial use at the time.
No, the OM602.961 is a non-interference engine. If the timing chain fails, the pistons will not contact the valves, preventing catastrophic internal damage. This design enhances reliability, though a failed chain will still stop the engine and require repair.
Mercedes specifies SAE 10W-40 oil meeting ACEA B2 or B3 specifications (or MB 229.1). This viscosity is crucial for protecting the mechanical injection pump and SOHC valvetrain. Change oil every 15,000 km or annually, using quality diesel-rated oil to ensure long-term engine health.
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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