The Mercedes-Benz OM 605.910 is a 2,694 cc, inline-five, turbocharged diesel engine produced between 1996 and 2003. It was a key powerplant in the mid-range diesel lineup for executive and commercial applications, featuring a Bosch M-System inline injection pump and a KKK turbocharger. Delivering 85 kW (116 PS) and 250 Nm, it offered strong low-end torque suitable for urban driving and light commercial use.
Fitted primarily to the W124 E-Class and Vito (W638) models, the OM 605.910 was engineered for durability and serviceability in mixed-use environments. It met Euro 2 emissions standards through combustion optimization and mechanical fuel control, without requiring EGR or DPF systems. This design prioritized reliability and ease of maintenance over complex emissions hardware.
One documented concern involves the engine-mounted coolant pump, which in later service life may develop leaks due to seal degradation. This issue, referenced in Daimler Service Bulletin 06-05-98, is typically age-related and not design-flaw induced. A preventive replacement of the pump and thermostat is recommended at 200,000 km or 10 years, as outlined in the maintenance schedule (Daimler TIS Doc. 605.910-20-01).
Production years 1996–2003 meet Euro 2 standards (VCA UK Type Approval #VCA/EMS/5680).
The Mercedes-Benz OM 605.910 is a 2,694 cc inline-five turbocharged diesel engine engineered for mid-size sedans and light commercial vans (1996–2003). It combines a robust cast-iron block with a KKK turbocharger and mechanical Bosch M-System injection to deliver responsive low-RPM performance and mechanical resilience. Designed to meet Euro 2 standards, it emphasizes durability and ease of service in high-mileage applications.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,694 cc | |
| Fuel type | Diesel | |
| Configuration | Inline-5, SOHC, 10-valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 87.0 mm × 90.0 mm | |
| Power output | 85 kW (116 PS) @ 4,200 rpm | |
| Torque | 250 Nm @ 2,200 rpm | |
| Fuel system | Bosch M-System inline injection pump (mechanical) | |
| Emissions standard | Euro 2 | |
| Compression ratio | 22.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | KKK K26 turbocharger | |
| Timing system | Gear-driven (no service interval) | |
| Oil type | MB 229.1 (SAE 15W-40) | |
| Dry weight | 215 kg |
The turbocharged inline-five layout provides improved low-end torque over naturally aspirated variants, enhancing drivability in stop-start conditions. The gear-driven timing system eliminates the need for belt or chain replacement, reducing long-term maintenance costs. MB 229.1 (15W-40) oil is essential for protecting the high-load mechanical injection pump and turbocharger bearings. Coolant pump and thermostat should be replaced preventively at 200,000 km or 10 years per Daimler SIB 06-05-98. The absence of EGR/DPF systems simplifies maintenance but requires attention to injector condition and air filter service to maintain combustion efficiency.
Oil Specs: Requires MB 229.1 (15W-40) specification (Daimler SIB 06-05-98). Compatible with ACEA B3/B4.
Emissions: Euro 2 certification applies to all models (1996–2003) (VCA Type Approval #VCA/EMS/5680).
Power Ratings: Measured under DIN 70020 standards. Output consistent across production run with no market-specific variants.
Daimler Technical Information System (TIS): Docs B30562, B31247, SIB 06-05-98
VCA Type Approval Database (VCA/EMS/5680)
SAE International: DIN 70020 Engine Power Testing Standard
The Mercedes-Benz OM 605.910 was used across Mercedes-Benz's W124 and W638 platforms with longitudinal mounting. This engine received platform-specific adaptations-reinforced mounts in the W124 Estate and compact accessory drives in the Vito-and from 1998 the facelifted W124 models adopted revised injection pump linkages, creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front-facing side of the cylinder block, near the timing cover (Daimler TIS B30791). The 8th VIN digit indicates engine type ('F' for OM 605 series). Pre-1997 W124 models have a mechanical throttle linkage; post-1997 Vito units use a revised cable routing. Critical differentiation from naturally aspirated variants: OM 605.910 features a KKK turbocharger and intercooler, with a larger exhaust manifold. Service parts require chassis code verification - coolant pumps for W124 and W638 are not interchangeable due to mounting differences (Daimler SIB 06-05-98).
The OM 605.910's primary reliability risk is coolant pump seal failure in high-mileage or aged vehicles, with elevated incidence in models over 15 years old. Daimler field reports from 2004 indicated a notable share of W638 Vito units requiring pump replacement after 200,000 km, while UK DVSA records show minimal emissions-related failures due to the absence of EGR/DPF systems. Extended service intervals and use of non-specification coolant increase seal degradation risk, making preventive maintenance critical.
Analysis derived from Daimler technical bulletins (1996-2006) and UK DVSA failure statistics (1999-2012). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about MERCEDES-BENZ OM605910.
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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