Mercedes W212 E63 AMG Rear Axle Air Suspension Bags Left Right Set A2123204325

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes W212 E63 AMG Rear Axle Air Suspension Bags Left Right Set is a set of pneumatic components for the rear axle, designed specifically for the Automatic level control system in Mercedes E-Class W212 E63 AMG models. The set allows for restoring the proper operation of the air suspension, stable body position, and ride comfort consistent with Mercedes standards.

Specifications and technical data

• SKU: A2123204325-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2123204325
• Substitutable numbers: A2123204325, A 212 320 43 25
• Location on the vehicle: Rear, Right, Left
• Category: Self-Levelling Suspension Parts

Purpose and function in the suspension system

The presented set of air bags is intended for installation on the rear axle, on the left and right sides, in Mercedes W212 E63 AMG series vehicles equipped with automatic level control. These components are responsible for maintaining the set body height regardless of the load, working in conjunction with leveling sensors and the suspension control unit.

Properly selected air bags ensure:

• stable rear axle geometry under variable loads,
• even body support on the left and right sides,
• correct operation of the automatic level control system without errors in the control unit.

Construction and technical characteristics

The set includes two air bags intended for installation at the rear of the vehicle – on the right and left sides. The design is adapted to the factory air suspension system in the E63 AMG version, which allows for maintaining original mounting points and compatibility with standard pneumatic lines.

Key performance features:

• compatibility with the factory automatic level control system,
• retention of the standard suspension performance characteristics,
• possibility of installation in place of original components without structural modifications.

Benefits of using the left + right rear set

Using a complete set for the rear axle allows for an even refresh of the air suspension operation. Replacing both air bags simultaneously reduces the risk of differences in characteristics between the left and right sides, which translates into more predictable vehicle behavior.

The main advantages of this configuration include:

• consistent suspension performance on both sides of the axle,
• better stability at higher speeds and during braking,
• more comfortable damping of unevenness in daily operation.

Condition, fitment, and practical application

The offered set comes from a group of used parts, which allows for an economical restoration of the suspension system's efficiency while maintaining the original specification. The components are intended for installation on the rear axle, on the right and left sides, in Mercedes W212 E63 AMG vehicles equipped with an automatic leveling system.

To ensure full compatibility, it is worth verifying the markings in the vehicle's technical specification and comparing them with the data in the product specification table, including information on the OEM part number, interchangeable numbers, and placement on the vehicle.

If you are planning a comprehensive repair or upgrade of the rear suspension area in your Mercedes and need other elements from the same group, such as air bags, shock absorbers, or leveling system components, check the available parts in the Automatic level control Mercedes category.

Technical support and additional knowledge

When working with advanced systems such as air suspension or modern transmissions, it is worth using reliable sources of knowledge. For users interested in a broader context of operating vehicles with automatic transmissions and their typical faults, the following guide may be helpful: Transmission: manual, automatic, or DSG – typical faults and a guide to buying a used transmission.

If you are considering a wider upgrade of your Mercedes using original dismantled components, it is also worth reading an article discussing the advantages of such solutions: Used parts for Mercedes – original components from dismantling.