Engine Cover Mercedes W906 Diesel OM651 Engine Accoustic Cover A6510106523

Visual condition of the part

The product shows signs of use visible in the photos.

Engine Cover Mercedes W906 Diesel OM651 Engine Accoustic Cover is a factory component from the Tappet and valve covers group, designed for OM651 diesel units in W906 series models. It ensures an organized engine bay, provides additional protection for critical components, and improves acoustic comfort during engine operation.

Specifications and technical data

• SKU: A6510106523
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6510106523
• Substitutable numbers: A6510106523, A 651 010 65 23
• Fuel type: Diesel
• Category: Rocker & Valve Covers

Purpose and technical function

The engine cover is dedicated to Mercedes vehicles with the OM651 diesel engine used in the W906 series. The component belongs to the Tappet and valve covers group, responsible for protecting the upper part of the power unit from dirt, moisture, and minor mechanical damage.

Using an original cover in a diesel engine helps limit the ingress of dirt around the cylinder head, makes it easier to keep the engine bay clean, and stabilizes airflow around the timing and valve train components.

Benefits of using an original cover

Choosing an original engine cover for a Mercedes W906 with an OM651 unit provides a range of practical operational benefits:

• better fit to the engine geometry compared to aftermarket replacements,
• stable mounting, reducing unwanted vibrations and noise,
• protection of valve train components and tappets from dust and moisture,
• an organized engine bay appearance, facilitating service work.

Thanks to maintaining the factory design of the cover, installation is predictable, without the need for modifying mounts or interfering with other power unit components.

Product characteristics and installation

The presented cover is a component sourced from a vehicle, which allows for maintaining the original Mercedes manufacturer specification. The product is designed for a diesel engine, which is significant due to the specific operating conditions of diesel units (higher thermal and mechanical loads in the upper part of the engine).

The engine cover is designed as a service component that can be removed and reinstalled during maintenance tasks. A correctly selected element facilitates access to the cylinder head and accessories, while simultaneously providing an appropriate level of protection and aesthetics for the engine bay once closed.

Application in the OM651 engine system

In OM651 units, the use of an appropriate cover is important not only visually but also functionally. This element:

• creates an additional barrier for contaminants in the area of tappets and valves,
• helps limit the spread of oil and vapors in the engine bay,
• supports the maintenance of stable operating conditions in the upper part of the power unit.

As a result, the engine maintains more predictable operating conditions, which promotes long-term and consistent performance of timing components.

Part selection and additional information

When selecting an engine cover for a Mercedes W906 with an OM651 unit, it is worth paying attention to compatibility with manufacturer markings and fuel type. The original element from the Tappet and valve covers group ensures compatibility with factory mounting points and maintains the airflow geometry in the engine bay as intended by the manufacturer.

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 shields, covers, or additional protective components, check the available parts in the Mercedes Tappet and valve covers category.

When comparing new and used parts, differences in costs and durability, an article describing the practical aspects of choosing service parts may be helpful – you can find more information in the material New or used? A comparison of car part costs and quality.