Mercedes W176 Engine Head Cover Top Engine Injector Cover OM607 175B15400R

Mercedes W176 Engine Head Cover Top Engine Injector Cover is a specialized component of the diesel engine fuel system, designed for the OM607 unit. It provides stable coverage for the injector section, which helps maintain proper operating conditions and facilitates maintenance. This is a practical solution for users who want to maintain factory order in the engine bay and ensure long-term, predictable operation.

Specifications and technical data

• SKU: 175B15400R
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: 175B15400R
• Substitutable numbers: 175B15400R, 175B17398P, 175B11122P
• Fuel type: Diesel
• Category: Air Filter Housings

Purpose and function in the diesel fuel system

The injector cover in the OM607 engine is responsible for mechanical protection of the injection components and organizing the wires and connectors in the upper part of the power unit. In a Diesel engine, precision and cleanliness in the injection area are crucial, which is why a properly selected cover helps limit the impact of contaminants, moisture, and temperature fluctuations on the working components.

Using a dedicated cover also allows for proper cable routing, which reduces the risk of chafing, accidental damage during maintenance work, and facilitates diagnostics. For the user, this means more predictable fuel system behavior and less susceptibility to minor operational faults.

Design, fitment, and installation

The cover has been designed for precise fitment to the OM607 engine in the Mercedes W176, ensuring it sits securely on factory mounts after installation. The design provides appropriate profiling for the injection elements and space for cable routing, which allows for maintaining the original component layout in the engine bay.

As an element from the Air filter housings group, the product works with the intake system environment without disrupting airflow or service access to key components. Installation is typical for OEM parts – once properly positioned, the cover rests on the factory mounting points, which shortens work time and reduces the risk of installation errors.

Performance characteristics and benefits

As a part sourced from dismantling, the injector cover offers a beneficial combination of original geometry and proven functionality at an attractive price compared to new components. Maintaining the factory shape and mounting points translates into:

• secure fitment with the OM607 engine without the need for modifications,
• preservation of original cable and connector routing,
• easier identification and maintenance of injectors,
• an aesthetic, organized look of the engine bay.

For workshops and private users, this means the ability to quickly replace a damaged or missing cover while maintaining the parameters specified by the vehicle manufacturer. A used OEM component is also a good choice when consistency with other engine accessory elements is required.

Condition, verification, and service application

The item is offered in used condition, which in practice means it comes from an operated vehicle but has been verified for suitability for further installation. This type of part will work well both for standard replacement of a damaged cover and for completing missing elements in an OM607 engine after major repairs or an engine swap.

Thanks to the preservation of the original design, the cover works well with the factory intake system and engine accessories, which is important for maintaining compliance with service documentation and during subsequent technical inspections.

Related elements and further reading

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other elements from the same group, such as additional covers, intake ducts, or air guiding elements, check the available parts in the Mercedes air filter housings category.

To better understand why used original components for premium cars are currently so often chosen by conscious drivers and workshops, it is worth reading the market analysis in the article Crisis in the new parts market? Why in 2026 used originals for premium cars (BMW, Mercedes, Porsche) are the hottest trend.