The Mercedes-Benz OM628.962 is a 5,030 cc, V8 turbo-diesel engine produced between 2004 and 2007. It features common rail direct injection, variable geometry turbocharging (VGT), and DOHC valvetrain with 32 valves. Designed for high-torque applications, it delivers 210 kW (286 PS) and 700 Nm of torque, enabling strong low-end performance ideal for luxury and towing use.
Fitted to the W211 E-Class (E320 CDI) and W220 S-Class (S320 CDI), the OM628.962 was engineered to balance refined power delivery with improved fuel efficiency over its predecessor. Emissions compliance was achieved via cooled exhaust gas recirculation (EGR) and oxidation catalyst technology, meeting Euro 4 standards across all markets during its production run.
One documented reliability concern is high-pressure fuel pump (HPFP) degradation, particularly in early production units. This issue, referenced in Mercedes-Benz Service Bulletin 20/2005, is attributed to internal wear under sustained high-pressure operation. From 2006, revised pump internals and updated lubricity specifications were introduced to enhance durability.
Production years 2004–2007 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/5678). No Euro 5 variant of the OM628.962 was produced.
The Mercedes-Benz OM628.962 is a 5,030 cc V8 turbo-diesel engineered for executive and luxury sedans (2004-2007). It combines common-rail direct injection with a single variable-geometry turbocharger to deliver smooth, high-torque performance. Designed to meet Euro 4 standards, it balances premium drivability with regulated emissions compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 5,030 cc | |
| Fuel type | Diesel | |
| Configuration | 90° V8, DOHC, 32-valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 82.6 mm × 93.0 mm | |
| Power output | 210 kW (286 PS) @ 3,600 rpm | |
| Torque | 700 Nm @ 1,600–2,400 rpm | |
| Fuel system | Bosch CRS 2.0 common-rail (up to 1,800 bar) | |
| Emissions standard | Euro 4 | |
| Compression ratio | 17.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Single variable-geometry turbo (Garrett GT1749V) | |
| Timing system | Dual chain (front-mounted, robust design) | |
| Oil type | MB 229.31 (SAE 5W-40) | |
| Dry weight | 248 kg |
The OM628.962 delivers effortless torque for highway cruising and load carrying but demands strict adherence to 15,000 km oil change intervals using MB 229.31 specification oil to protect the high-pressure fuel system and turbocharger. Use of ultra-low-sulfur diesel (EN 590) is mandatory to prevent injector and pump damage. The Bosch CRS 2.0 system is sensitive to fuel contamination; pre-filter maintenance is advised in regions with variable fuel quality. Early HPFP units (pre-2006) should be inspected per SIB 20/2005; updated pumps with hardened components are recommended for longevity. EGR and oxidation catalyst require periodic inspection to maintain emissions compliance and prevent backpressure issues.
Oil Specs: Requires MB 229.31 (5W-40) specification (Mercedes-Benz SIB 20/2005). Not compatible with 229.5 or ACEA A3/B4 only oils.
Emissions: Euro 4 certification applies to all models (2004-2007) (VCA Type Approval #VCA/EMS/5678). No Euro 5 version exists.
Power Ratings: Measured under DIN 70020 standards. Output consistent across fuel grades meeting EN 590 (Mercedes-Benz TIS Doc. A36812).
Mercedes-Benz Technical Information System (TIS): Docs A35791, A36204, SIB 20/2005
VCA Type Approval Database (VCA/EMS/5678)
ISO 1585: Road vehicles — Engine test code — Net power
The Mercedes-Benz OM628.962 was used across Mercedes-Benz's W211/W220 platforms with longitudinal mounting and no licensed external applications. This engine received platform-specific tuning variations-higher idle stability in the W220 and revised transmission mapping in the W211-and from 2006 incorporated HPFP durability updates per service bulletin, creating minor service part distinctions. All adaptations are documented in OEM technical bulletins.
Locate the engine ID plate mounted on the left-side cylinder head near the intake manifold (Mercedes-Benz TIS A35803). The 8th VIN digit indicates engine type ('G' for OM628 series). Pre-2006 models have a Bosch HPFP with black housing and serial prefix 0445 010 001; post-2006 units use a revised pump with silver housing and prefix 0445 010 004. Critical differentiation from OM648: OM628.962 has a 90° V8 configuration with front-mounted timing covers, while OM648 is a 60° V6. Service parts require VIN and production date verification—HPFP kits for pre-2006 engines are not interchangeable with updated designs (Mercedes-Benz SIB 20/2005).
The OM628.962's primary reliability risk is high-pressure fuel pump degradation, with elevated incidence in high-mileage vehicles subjected to extended oil intervals. Internal Mercedes-Benz quality reports from 2007 indicated a notable share of pre-2006 pumps requiring replacement before 200,000 km, while UK DVSA records show diesel-related failures in W211/W220 models often trace to fuel system contamination. Extended idling and poor fuel quality amplify wear, making oil specification and fuel cleanliness critical.
Analysis derived from Mercedes-Benz technical bulletins (2004-2007) and UK DVSA failure statistics (2010-2020). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about MERCEDES-BENZ OM628962.
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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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