Engine Mount Mercedes W204 W212 Diesel OM651 Right O/S Support A2122404217

Mercedes W204 W212 Engine Mount Right Diesel OM651 A2122404217 is a factory engine mounting bracket, designed for the right side of the engine bay in Mercedes vehicles with the OM651 diesel engine. This component belongs to the Engine Mounts group and is a key part responsible for the stable, controlled support of the powertrain. A used OEM part is a sensible choice for drivers who expect correct mounting geometry and compatibility with factory mounting points.

Specifications and technical data

• SKU: A2122404217
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2122404217
• Substitutable numbers: A2122404217, A 212 240 42 17
• Location on the vehicle: Right
• Fuel type: Diesel
• Category: Engine Mounts

Purpose and Function in the Drivetrain

The right-side engine mount is responsible for transferring loads from the engine to the chassis, working in conjunction with other mounting components. For OM651 diesel engines, this is particularly important due to their operating characteristics – higher torque and specific vibrations require appropriately selected, rigid, yet damping support.

A properly selected mount in the Engine Mounts category helps to:

• maintain the correct position of the engine relative to the chassis and drivetrain,
• reduce vibration transfer to the passenger cabin,
• ensure proper operation of the driveshafts, exhaust, and engine accessories,
• minimize the risk of unwanted stress in cooperating components.

Compatibility with OM651 Diesel Unit

The presented mount is designed to work with the OM651 diesel engine, widely used in Mercedes C-Class (W204) and E-Class (W212) models. Using the correct part for a specific fuel type is important for:

• appropriate damping characteristics for typical diesel vibrations,
• maintaining factory mounting geometry,
• correct force distribution in the engine support system.

This ensures predictable installation and stable engine operation after replacement, without the need for additional structural modifications.

Vehicle Placement and Installation Aspects

The mount is designed for installation on the right side of the vehicle, which is important for both part selection and service planning. Correct placement ensures:

• proper engine support in the transverse and longitudinal axes,
• compatibility with factory mounting points in the chassis,
• interference-free cooperation with engine accessories and suspension components.

A used OEM engine mount is a practical solution when the existing part has suffered mechanical damage, deformation, or corrosion, and maintaining the original mounting system design is a priority.

Benefits of Using an Original Engine Mount

Using an original component from the engine mounting group in a Mercedes W204 or W212 allows for maintaining performance parameters close to factory settings. The most important benefits include:

• Factory Fitment – maintaining the correct position of the powertrain relative to the chassis and drivetrain.
• Compatibility with OM651 Diesel Design – the mount was designed for the specific loads and operating characteristics of this engine.
• Powertrain Stabilization – reducing excessive engine movement during acceleration, engine braking, and gear changes.

This approach translates to more predictable vehicle behavior, reduced stress on cooperating components, and comfortable everyday driving.

Engine Mounting System Expansion and Service Knowledge

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

When planning a larger scope of work, it is also worth considering other components related to the drivetrain and accompanying elements. The article Comprehensive Sourcing: From Engine to the Smallest Clip – How to Assemble Used Car Parts in One Place? explains how to effectively select a set of used parts and avoid accidental replacements, discussing the One-Stop-Shop approach and the benefits of choosing original dismantled parts.

If you are also interested in the environmental and economic aspects of using used components, it is worth reading the material Eco-Driving: Discover the Benefits of Used Car Parts, which describes the impact of part reuse on operating costs and environmental footprint.