Fuel injector MERCEDES Classe C (W204 / S204) 300 CDI 231 hp

The Mercedes-Benz OM642 300 CDI 231 hp engine, widely used in models like the E-Class, ML-Class, and GL-Class, is known for its durability but requires precise fuel injection to maintain optimal performance. This category focuses on exchange standard injectors designed to replace faulty units while preserving the engine’s original power output and efficiency. Whether you are a professional mechanic seeking a direct-fit solution or an automotive enthusiast restoring a classic model, these injectors offer a cost-effective alternative to new OEM parts without sacrificing quality.

The range of injectors for the OM642 300 CDI 231 hp is curated to address common failure points such as clogged nozzles, worn seals, or internal corrosion, which can lead to misfires, excessive smoke, or reduced fuel economy. By partnering with specialized remanufacturers, we ensure each injector undergoes rigorous testing for spray pattern, pressure consistency, and electrical integrity before being listed. This approach allows garages to maintain their inventory with high-turnover, ready-to-install units while offering private owners a dependable solution for urgent repairs.

Professional uses by trade

Different users approach injector replacement with distinct priorities: professionals prioritize compatibility and bulk availability, while DIYers focus on ease of installation and immediate availability. Below, we outline how each group leverages these exchange standard injectors to resolve performance issues efficiently.

• Le garagiste independant : Replaces worn injectors in OM642 engines to restore smooth idling and eliminate diagnostic trouble codes linked to fuel delivery faults.
• L'automobiliste depanne : Orders a pre-tested injector to avoid costly workshop visits, ensuring quick installation and immediate return to reliable driving.
• Le passionne qui fait lui-meme : Sources a remanufactured injector to complete a restoration project without compromising on OEM-like performance.
• Der deutsche Kaeufer (DACH) : Selects an exchange standard injector to address common OM642 issues such as black smoke or rough acceleration in high-mileage vehicles.
• Le garagiste independant : Stocks calibrated injectors to reduce downtime for customers with Mercedes-Benz models requiring urgent repairs.
• L'automobiliste depanne : Chooses a tested injector to replace a failing unit, avoiding the risk of further engine damage from inconsistent fuel delivery.
• Der deutsche Kaeufer (DACH) : Prioritizes injectors with verified spray patterns to ensure optimal combustion and fuel efficiency in daily-driven OM642 engines.

Range comparison

The following table compares the two Bosch injector references available for the OM642 300 CDI 231 hp, highlighting their compatibility and intended use cases for professionals and private owners alike.

How to choose

Selecting the right injector for the OM642 300 CDI 231 hp requires attention to compatibility, condition, and intended use. Professionals should evaluate factors like electrical resistance, spray pattern consistency, and packaging integrity to ensure long-term reliability.

1. Conditioning: Verify the injector’s remanufacturing process includes pressure testing and nozzle cleaning to prevent premature failure.
2. Compatibility: Confirm the injector matches the engine’s OEM specifications, including electrical connectors and mounting dimensions.
3. Packaging: Prefer injectors shipped in sealed, anti-static containers to protect against moisture and electrostatic damage during storage.
4. Rotation: Prioritize injectors with recent manufacturing dates to ensure fresh seals and minimal wear on internal components.
5. Testing: Select units that have undergone dynamic flow testing to confirm consistent fuel delivery across all cylinders.
6. Traceability: Choose injectors with batch numbers or QR codes for easy identification and warranty validation if issues arise.
7. Bulk availability: For workshops, opt for injectors supplied in bulk packaging to streamline inventory management and reduce per-unit costs.

Storage & logistics

Proper storage of exchange standard injectors is essential to maintain their performance until installation. Keep units in a climate-controlled environment, away from direct sunlight and humidity, to prevent seal degradation or corrosion. For garages, organizing injectors by engine model and reference number in labeled bins or drawers minimizes handling errors and speeds up order fulfillment. Always inspect packaging for damage before storage, and avoid stacking heavy items on top of injector sets to prevent deformation. Regular inventory audits help identify units nearing their recommended shelf life, ensuring only fresh stock is used for customer orders. This disciplined approach reduces waste and delivers that every injector meets the high standards required for OM642 engines.

With over a decade of sourcing remanufactured injectors for European diesel engines, our team has refined the process to deliver units that perform like new—without the premium price tag. Every injector in this category is selected for its ability to restore the OM642’s signature responsiveness and fuel efficiency, backed by our commitment to quality since 2026.— autoKUR team

Related categories

Browse our other ranges:

• 350 CDI 265 hp
• 350 CDI 231 hp
• 350 CDI 224 hp
• 250 CDI 204 hp
• 200 CDI 170 hp
• 220 CDI 170 hp

Useful references

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