Mercedes W204 M156 Engine Mount Holder Carrier Support A2212400817

Mercedes W204 M156 Engine Mount Cushion Bracket Holder is an original part from the Engine Mounts group, designed for stable seating of the power unit in the body. This used Mercedes part ensures factory fitment, proper load transfer, and vibration reduction in the engine bay.

Specifications and technical data

• SKU: A2212400817
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2212400817
• Substitutable numbers: A2212400817, A 221 240 08 17
• Category: Engine Mounts

Purpose and Technical Function

The engine cushion, mount, and bracket in one assembly are responsible for maintaining the power unit in the correct position relative to the body, as well as for controlled vibration damping. In the case of constructions used in Mercedes with the M156 unit, the following are crucial:

• stable engine support under high mechanical loads,
• reduction of vibration transfer to the vehicle body and interior,
• maintenance of correct drivetrain geometry during acceleration and engine braking.

By preserving the original mounting geometry, this element supports the correct operation of the drivetrain, exhaust system, and components cooperating with the engine.

Benefits of Using an Original Mercedes Engine Mount

Using an original engine mount in place of a worn-out part allows for the restoration of the power unit's factory operating parameters. The most important benefits include:

• Precise fitment to mounting points on the body and engine block, without the need for modifications.
• Reduction of knocks, vibrations, and unwanted noises resulting from excessive play in the mount.
• Better cooperation with other drivetrain components, contributing to vehicle stability.

For high-power units like the M156, the correct selection of the engine mount is crucial for the durability of the entire system and driving comfort.

Part Condition and Installation Aspects

The offered part is in used condition, meaning it comes from disassembly and retains functionality suitable for further operation. In practice, this translates to:

• factory construction compliant with vehicle manufacturer's requirements,
• possibility of installation in place of the original mount without modifying mounting points,
• retention of proper stiffness and operating characteristics under typical usage conditions.

Before installation, a standard visual inspection is recommended, and installation should be performed according to the service procedures for the specific Mercedes W204 model with the M156 engine.

Compatibility and Part Selection

When selecting an engine mount for a specific body version and power unit, it is crucial to compare its parameters with the originally installed part and verify compatibility in the service documentation. This engine mount has been specifically designed for the M156 unit in the Mercedes W204, ensuring:

• compatibility with factory mounting points,
• appropriate vibration damping characteristics for this drive configuration,
• cohesion with other engine support system components.

Such a fitment reduces the risk of incorrect powertrain alignment and accelerated wear of adjacent components.

Expanding the Mercedes Engine Mount System

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 more cushions, check the available parts in the Mercedes Engine Mounts category.

More About Completing Used Parts

When planning a larger scope of service work, it is worth familiarizing yourself with the principles of effectively sourcing original parts from the secondary market. Practical tips on selecting used components, the benefits of One-Stop-Shop purchases, and ways to avoid low-quality aftermarket parts can be found in the article Comprehensive Sourcing: From Engine to the Smallest Clip – How to Assemble Used Car Parts in One Place?.