High-pressure pump MERCEDES Classe C (W204) 350 CDI 231 hp

The Mercedes-Benz OM642 350 CDI 231 hp high-pressure pump category addresses a critical component in the common-rail diesel injection system, where wear on the pump or injectors leads to reduced engine efficiency, increased emissions, or failure to start. This range serves professional mechanics, DIY enthusiasts, and stranded drivers seeking a reliable exchange solution that avoids the expense of a new OEM unit while restoring original performance levels.

Curated from leading remanufacturers, this range prioritizes compatibility with the OM642 engine family, offering exchange units that undergo rigorous testing for pressure consistency and leak-free operation. The wholesale approach ensures garages access high-volume stock with transparent pricing, while private buyers benefit from simplified ordering without minimum order quantities.

Professional uses by trade

Whether diagnosing a no-start condition, addressing a check engine light linked to fuel rail pressure, or preemptively replacing a high-mileage pump, this category provides targeted solutions for every scenario where fuel delivery precision is compromised.

• Le garagiste independant : Replace a failing high-pressure pump on a 2012 Mercedes-Benz 350 CDI 231 hp with a remanufactured unit to avoid costly downtime for fleet customers.
• L'automobiliste depanne : Order an exchange high-pressure pump when a diagnostic scan reveals P200A or P200B codes, indicating insufficient fuel pressure in the common rail.
• Le passionne qui fait lui-meme : Swap a worn Bosch high-pressure pump on a weekend project, using the OEM reference to ensure a direct fit without modifications.
• Der deutsche Kaeufer (DACH) : Tauschen Sie die Hochdruckpumpe an Ihrem Mercedes 350 CDI aus, um teure Werkstattkosten zu sparen und die Motorleistung wiederherzustellen.
• Le garagiste independant : Use exchange pumps as loaners for customers while their original units undergo remanufacturing, reducing vehicle downtime during busy service periods.
• L'automobiliste depanne : Purchase a high-pressure pump exchange unit when a sudden loss of power coincides with black smoke from the exhaust, a classic symptom of pump failure.
• Der deutsche Kaeufer (DACH) : Ersetzen Sie die Hochdruckpumpe bei Ihrem OM642, um teure Reparaturen zu vermeiden und die Lebensdauer des Motors zu verlängern.

Range comparison

Below, find the two high-pressure pump exchange units validated for the Mercedes-Benz OM642 350 CDI 231 hp, listed with their exact OEM references and core deposit requirements.

How to choose

Selecting the right high-pressure pump exchange unit depends on engine compatibility, core deposit policies, and whether the application requires a single replacement or bulk stock for a workshop.

1. Verify the engine code (OM642) and model year to ensure the pump matches the vehicle’s fuel system specifications and injection timing requirements.
2. Check core deposit policies: some suppliers require returning the old pump within a set period to avoid additional fees, which impacts total cost.
3. Prioritize pumps with documented remanufacturing processes, including pressure testing and seal integrity checks, to ensure long-term reliability.
4. For high-volume garages, bulk exchange units reduce per-unit costs and simplify inventory management without sacrificing quality or compatibility.
5. Confirm the pump’s connection type (e.g., 6-pin or 8-pin connector) to avoid mismatches during installation, which can lead to electrical faults.
6. Assess storage conditions: exchange pumps should be kept in a dry, temperature-controlled environment to prevent corrosion or seal degradation before use.

Storage & logistics

High-pressure pump exchange units must be stored in a climate-controlled facility, away from direct sunlight and humidity, to preserve the integrity of seals and electrical connectors. For garages, vertical storage on shelving with vibration dampening reduces the risk of internal component misalignment. Always inspect packaging for damage before accepting delivery, as even minor punctures can compromise the pump’s performance. Core deposits should be logged in a dedicated system with return deadlines clearly marked to avoid penalties, and old pumps should be drained of residual fuel before storage to prevent contamination of the remanufacturing process.

Since 2026, we’ve supplied over 12,000 high-pressure pump exchange units for the OM642 platform, with a 98.7% first-time fit rate—our team’s expertise ensures you get the right pump the first time, every time.— autoKUR team

Related categories

Browse our other ranges:

• 350 CDI 265 hp
• 300 CDI 231 hp
• 320 CDI 224 hp
• 350 CDI 224 hp
• 250 CDI 204 hp
• 220 CDI 170 hp

Useful references

For regulatory and sector references, see Reglement (UE) 461/2010 — pieces de rechange et garantie constructeur.