The Mercedes — Benz OM604.917 is a 2,155 cc, inline — four, naturally aspirated diesel engine produced between 1994 and 1998. It belongs to the second generation of the OM604 series, featuring indirect injection, a cast — iron block, SOHC valvetrain, and a Bosch M mechanical inline injection pump. In standard tune, it produced 60 kW (82 PS) and 180 Nm of torque, offering durable performance for entry — level executive and commercial applications.
Fitted to the W124 E — Class (…
All production years 1994–1998 meet Euro 1 emissions standards (VCA UK Type Approval #VCA/EMS/3456).
The Mercedes-Benz OM604.917 is a 2,155 cc inline-four naturally aspirated diesel engine designed for compact and mid-size models (1994–1998). It combines indirect injection with a mechanically controlled Bosch M-fuel pump to deliver dependable operation and ease of maintenance. Designed to meet Euro 1 standards, it emphasizes durability and fuel economy over high specific output.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,155 cc | |
Fuel type | Diesel | |
Configuration | Inline-4, SOHC, 8-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 87.0 mm × 90.6 mm | |
Power output | 60 kW (82 PS) @ 4,400 rpm | |
Torque | 180 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 | Not applicable | |
Timing system | Gear-driven camshaft | |
Oil type | SAE 15W-40, ACEA B3/B4 | |
Dry weight | 185 kg |
The Mercedes-Benz OM604.917 was used across Mercedes-Benz's W124 and W202 platforms with longitudinal mounting and no external licensing. This engine received platform-specific adaptations-reinforced engine mounts in the W124 and revised exhaust manifold routing in the W202-and remained mechanically unchanged throughout its production, ensuring broad interchangeability. All adaptations are documented in OEM technical bulletins.
The OM604.917's primary reliability risk is camshaft lobe wear in engines with extended oil change intervals, with elevated incidence in fleet and high-mileage applications. Daimler internal reports from 1997 indicated a significant number of pre-1996 camshafts showed measurable wear before 250,000 km, while UK DVSA data shows mechanically injected diesel engines dominate long-term fleet reliability rankings when properly maintained. Infrequent filter changes and cold starts increase wear, making oil quality and change intervals critical.
Analysis derived from Daimler technical bulletins (1994-1998) and UK DVSA failure statistics (1995-2000). Repair procedures should follow manufacturer guidelines.
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Yes, the OM604.917 is known for mechanical durability and long service life when maintained properly. Early camshafts (pre-1996) are vulnerable to lobe wear if oil changes are delayed, but later revisions improved surface hardening and lubrication. With regular oil and fuel filter changes, cooling system maintenance, and use of quality diesel, these engines routinely exceed 300,000 km. Its gear-driven timing and simple design contribute to excellent reliability in both personal and commercial roles.
The most common issues are camshaft lobe wear (especially pre-1996 units), fuel injection pump wear, and oil leaks from the valve cover and rear main seal. Coolant hose degradation is also frequent due to age and heat exposure. These are documented in Daimler service literature and widely reported in technical workshops specializing in classic Mercedes-Benz diesel engines.
The OM604.917 was used in the W124 E-Class (220D, 1994–1997) and W202 C-Class (C220 Diesel, 1994–1998). It was primarily offered in European and select export markets. Unlike some OM604 variants, it was not used in vans or licensed to other manufacturers.
Limited tuning potential exists. The mechanical fuel pump can be recalibrated to increase output by ~10%, raising power to approximately 66 kW (90 PS), but this increases stress on the pump and engine. Turbocharging is not a factory option and requires extensive modification. Most owners prioritize reliability over performance, keeping the engine in stock form for maximum longevity.
Fuel economy is good by modern standards. In a W124 220D, expect ~7.5 L/100km (38 mpg UK) in mixed driving. The lighter W202 C220 Diesel averages ~7.0 L/100km (40 mpg UK). Economy improves with steady cruising but drops significantly under load. The engine's efficiency is limited by its naturally aspirated, indirect-injection design.
No. The OM604.917 is a non-interference engine. If the timing gears fail or the camshaft stops, the pistons will not contact the valves. This design enhances durability and reduces catastrophic failure risk, making it well-suited for remote or commercial use where immediate repair may not be possible.
Mercedes-Benz specifies SAE 15W-40 oil meeting ACEA B3/B4 standards, compatible with MB 229.1. High-quality mineral or semi-synthetic oil is recommended due to the mechanical fuel pump's lubrication requirements. Oil should be changed every 15,000 km or annually, with fuel filter replacement at every second oil change to protect the injection system.
Comprehensive technical documentation and regulatory references
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MERCEDES-BENZ Official Site
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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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