Engine Mount Mercedes W204 Diesel OM642 Right O/S Support Holder A2042400517

The Right Engine Mount for Mercedes W204 Diesel OM642 is a load-bearing component responsible for the stable support of the engine unit on the passenger side. A properly selected mount significantly reduces vibration transfer to the body, improves engine running smoothness, and supports safe vehicle handling. This item from the Engine Mounts group is designed for Mercedes vehicles with a diesel engine, ensuring proper adaptation to the loads characteristic of Diesel units.

Specifications and technical data

• SKU: A2042400517
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2042400517
• Substitutable numbers: A2042400517, A 204 240 05 17, BG
• Location on the vehicle: Right
• Fuel type: Diesel
• Category: Engine Mounts

Purpose and Function in the Drivetrain

The described right engine mount is structurally adapted for Mercedes C-Class W204 models with the OM642 unit, which is a six-cylinder diesel engine. Its task is to maintain the correct position of the powertrain relative to the body and to control the powertrain's operation during acceleration, engine braking, and load changes.

Its placement on the right side of the vehicle means this component operates in a critical area where forces resulting from the engine's mass and torque accumulate. A correctly selected engine mount on this side limits undesirable movements of the engine unit, leading to more stable handling and reduced stress on other auxiliary components.

Benefits of Using a Dedicated Engine Mount

Using a dedicated mount for the Diesel engine in the Mercedes W204 offers a range of practical operational benefits:

• better damping of vibrations transferred from the engine unit to the bodywork,
• reduced cabin noise, especially at idle and low speeds,
• more stable powertrain behavior during sudden load changes,
• lower stress on the exhaust system and engine auxiliary lines,
• more predictable drivetrain responses during acceleration and gear changes.

By correctly selecting the component for a specific diesel engine configuration, the cohesive operation of the entire drivetrain is achieved, which is important for both driving comfort and the durability of other components.

Mounting Characteristics and Fitment

The right-side engine mount is designed to work with factory mounting points on the body and engine block. The correct geometry of the mount facilitates installation and allows for the maintenance of the engine unit's factory position relative to the vehicle's axis. This is crucial for the proper operation of the drive shafts, exhaust system, and supply and return lines.

For Diesel units like the OM642, the mount's design must account for higher loads resulting from significant torque. Using a component specifically designed for this engine configuration helps avoid problems with excessive deflection, knocking during acceleration, or improper force transfer to the body.

Application in Service Practice

Replacing the right engine mount is recommended when noticeable vibrations are felt in the steering wheel or body, knocking sounds are heard during gear changes, or the engine unit visibly rocks when accelerating or decelerating. Selecting a component dedicated to the diesel engine in the Mercedes W204 allows for the restoration of correct powertrain operating conditions without the need to interfere with other sub-assemblies.

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other items from the same group, such as additional mountings, brackets, or vibration damping elements, check the available parts in the Mercedes Engine Mounts category.

How to Optimally Select Used Engine Auxiliary Components

When selecting a used engine mount, it is worth paying attention to its compatibility with the specific engine unit version and its fitment with the mounting system in the body. A correctly chosen component helps avoid modifications and ensures stable engine operation across the full load range. To better plan your purchases and gather all necessary components in one place, it is advisable to consult a guide on organizing the purchase of used parts – details can be found in the article Comprehensive Sourcing: From Engine to the Smallest Clip – How to Assemble Used Car Parts in One Place?.

If you are interested in a broader context of operating Mercedes C-Class engine units and want to better understand the impact of engine auxiliaries on reliability, a resource dedicated to the practical aspects of servicing may also be helpful – check the article Reliability Under the Star: How to Care for Engine Auxiliaries in Popular Mercedes-Benz C-Class and E-Class Models?.