Mercedes W207 W212 Engine Mount Bearing Support Left N/S OM651 A2122400000

Mercedes W207 W212 Engine Mount Bearing Support Left N/S is an original engine mounting component designed for E-Class and E-Coupé models equipped with the OM651 engine. Its robust construction and factory-spec geometry ensure stable engine support, vibration reduction, and proper load transfer to the chassis. This is a practical solution for users looking to restore the proper operation of the powertrain after damage to the factory mount.

Specifications and technical data

• SKU: A2122400000
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2122400000
• Substitutable numbers: A2122400000, A 212 240 00 00
• Location on the vehicle: Left
• Part type: Engine Mount
• Category: Engine Mounts

Purpose and function of the component

The presented engine mount support bracket is dedicated to the powertrain system with the OM651 diesel engine in W207 and W212 bodies. The component is responsible for rigid yet controlled mounting of the power unit on the left side of the vehicle, working in conjunction with the engine mount and other support points.

A properly selected engine mount support allows you to:

• maintain the correct position of the engine relative to the chassis and drivetrain,
• reduce the transmission of vibrations and oscillations to the cabin,
• decrease the load acting on other mounts and auxiliary components,
• maintain the correct geometry of the powertrain during acceleration and engine braking.

Construction and compatibility with OM651

The support bracket has been designed specifically for the architecture of the OM651 engine and the front body structure of the W207/W212. Properly shaped mounting points ensure precise fitment with the engine block and the mount, which facilitates installation and minimizes the risk of stress resulting from improper alignment.

The factory design of the bracket guarantees:

• preservation of the original engine mounting line,
• proper distribution of forces onto the mount and the chassis,
• compatibility with standard auxiliary components in the engine bay.

Vehicle placement and installation aspects

The component is intended for installation on the left side of the vehicle, in the front powertrain zone. Correct placement of the bracket is crucial for maintaining the alignment of the powertrain and ensuring proper interaction with the half-shafts, exhaust system, and other mounts.

When replacing, it is recommended to:

• check the condition of the cooperating engine mount,
• inspect other power unit mounting points,
• apply appropriate tightening torques in accordance with service documentation.

Benefits of using the original support bracket

Using the original engine mount support in a Mercedes W207/W212 allows you to maintain factory driving characteristics and acoustic comfort. Compared to replacements with uncertain geometry, a properly selected component reduces the risk of incorrect engine alignment, accelerated wear of mounts, and the appearance of unwanted vibrations.

This solution is particularly recommended for:

• repairs after collisions in the front part of the vehicle,
• replacing worn or damaged engine mounts,
• diagnosing excessive vibrations and knocking in the powertrain area.

Mercedes engine mounts – expansion and modernization of the mounting system

If you are planning a comprehensive repair or modernization of the engine area in your Mercedes and need other components from the same group, such as additional brackets, supports, or further mounts, check the available parts in the Mercedes engine mounts category.

More about engine accessories and used parts

When working within the power unit, it is also worth paying attention to elements affecting exhaust emissions and engine refinement. If you want to better understand how associated systems work and when it is worth opting for used components, read the article EGR: what it is and why it is worth considering used EGR valves, which discusses issues related to the operation and selection of parts in modern engines in an accessible way.