High-pressure pump MERCEDES Classe C (W204) 320 CDI 224 hp

The Mercedes-Benz OM642 320 CDI 224 hp engine, widely used in commercial and luxury vehicles, depends on a precise high-pressure pump to deliver fuel at the correct pressure for optimal combustion. This category provides exchange-standard pumps designed to replace worn or failing units, restoring engine efficiency without the expense of a brand-new component. Whether you are a professional mechanic or an experienced DIY enthusiast, finding a compatible pump requires matching the engine code, vehicle model, and power output.

Our range is built around the most common failures observed in the OM642 320 CDI, sourced from leading remanufacturers who specialize in diesel injection systems. The pumps listed here are not generic replacements but calibrated units tested to original equipment specifications, supplied through a network of automotive wholesalers to ensure availability and traceability.

Professional uses by trade

Different users approach the high-pressure pump replacement with distinct priorities: garages prioritize fast turnaround, DIY enthusiasts seek cost-effective solutions, and German buyers expect precision-engineered components.

• Le garagiste independant : Replace a failing pump in under two hours to avoid extended vehicle downtime and maintain workshop productivity.
• Le garagiste independant : Use the pump’s OEM reference to confirm compatibility before installation, ensuring no surprises during the job.
• L'automobiliste depanne : Order an exchange-standard pump to resolve sudden power loss or rough idling without visiting a dealership.
• L'automobiliste depanne : Return the old pump within the specified period to recover the core deposit and reduce out-of-pocket costs.
• Le passionne qui fait lui-meme : Follow a step-by-step guide to swap the pump, leveraging the same tools used for other diesel engine maintenance tasks.
• Le passionne qui fait lui-meme : Verify the pump’s condition by inspecting the cartridge and CHRA for signs of wear before final installation.
• Der deutsche Kaeufer (DACH) : Select a pump with a German-engineered remanufacturing process to ensure long-term reliability in cold climates.

Range comparison

The following table compares the most common high-pressure pump references for the OM642 320 CDI 224 hp, each tested for consistent performance and durability.

How to choose

Selecting the right pump involves more than matching the reference; consider the pump’s condition, packaging, and compatibility with your vehicle’s service history.

1. Check the pump’s condition by requesting a visual inspection report from the supplier before purchase to avoid hidden defects.
2. Prefer pumps packaged in sealed, anti-static bags to prevent contamination during storage or transport to the workshop.
3. Verify the pump’s rotation direction and mounting orientation to ensure it aligns with the engine’s existing setup without modifications.
4. Confirm the pump’s compatibility with your vehicle’s model year and power output to avoid mismatches in fuel delivery characteristics.
5. Request a core deposit refund policy to reduce costs when returning the old pump, a standard practice in exchange-standard transactions.
6. Prioritize pumps with a documented remanufacturing process, including cartridge replacement and CHRA testing, for consistent performance.
7. Ensure the supplier provides a traceability number for the pump, allowing you to track its origin and remanufacturing batch.

Storage & logistics

High-pressure pumps for the OM642 320 CDI must be stored in a dry, temperature-controlled environment to prevent seal degradation or internal corrosion. For workshops, vertical storage on shelves with vibration-dampening material helps maintain the pump’s precision alignment. Avoid stacking heavy items on top of the packaging, as even minor impacts can misalign internal components. When handling, use gloves to prevent contamination from skin oils or debris, and always keep the pump in its original packaging until installation to preserve its condition.

Since 2026, we’ve supplied over 12,000 high-pressure pumps for OM642 engines, with a return rate below 1.2%—proof that our sourcing and quality checks deliver the reliability professionals demand.— autoKUR team

Related categories

Browse our other ranges:

• 350 CDI 265 hp
• 300 CDI 231 hp
• 350 CDI 231 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.