Mercedes C E W203 W211 OM646 Diesel Gearbox Timing Case Cover A6460150632

Mercedes C E W203 W211 OM646 Diesel Gearbox Timing Case Cover is an original component factory-fitted in the Diesel units of this series. Designed by the vehicle manufacturer, it ensures precise fitment to the engine block and gearbox, stabilizing the timing system operation and sealing the front section of the powertrain.

Specifications and technical data

• SKU: A6460100733
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6460100733
• Substitutable numbers: A6460100733, A 646 010 07 33, A6460150632, A 646 015 06 32, BG
• Fuel type: Diesel
• Category: Cylinder Heads

Purpose and function in the OM646 engine

The described Mercedes C E W203 W211 OM646 Diesel Gearbox Timing Case Cover is a structural component used in OM646 diesel engines fitted in Mercedes C-Class W203 and E-Class W211 models. It is responsible for the stable guidance and seating of timing components on the gearbox side, as well as maintaining proper sealing between the engine and the transmission housing.

Thanks to its factory design, it ensures:

• precise fitment with the engine block and gearbox,
• proper positioning of timing components,
• maintenance of lubrication system tightness in the front part of the powertrain.

Application in Mercedes Diesel vehicles

The cover is designed for OM646 Diesel units, widely used in mid-size Mercedes vehicles. The construction was developed specifically for the operating characteristics of diesel engines – taking into account higher mechanical loads and the specifics of the timing system in these units.

In practice, this means that this component is particularly important when:

• overhauling an OM646 engine in a Mercedes C-Class W203 or E-Class W211,
• eliminating leaks in the front part of the powertrain,
• restoring factory timing mounting geometry after a collision or major failure.

Characteristics of the used component

The offered cover belongs to the Cylinder Heads category in terms of components related to the upper and front part of the engine. As a used part, it comes from dismantling, which allows for maintaining the original manufacturer's specification while reducing repair costs. Such components are preferred for professional overhauls where compliance with the factory design and maintaining proper mounting geometry are crucial.

Benefits of using an original cover

Using an original Mercedes C E W203 W211 OM646 Diesel Gearbox Timing Case Cover in an OM646 engine provides a number of practical service benefits:

• Factory fitment – no need for modifications, drilling, or adjusting mounting holes.
• Timing stability – proper support and guidance of components on the gearbox side.
• Restoration of tightness – the ability to properly seal the engine-gearbox interface after replacing gaskets and oil seals.
• Consistency with other Mercedes powertrain components, which facilitates further diagnostics and service.

Related components and additional information

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other components from the same group, such as housings, covers, or fasteners, check the available parts in the Mercedes Cylinder Heads category.

For larger service tasks, it is also worth ensuring the proper condition of the vehicle steering system. For a better understanding of the relationship between mechanical components and vehicle handling, you can use the advice contained in the article Steering system and power steering – how it works and what fails?, which discusses symptoms of wear, basics of diagnostics, and examples of used parts.