Mercedes W166 AMG Rear Air Spring Strut Shock Absorber Left Right N/O/S

Mercedes W166 AMG Rear Air Spring Strut Shock Absorber Left Right N/O/S is a component from the Shock absorbers and struts category, designed for the vehicle's rear axle. It ensures proper body support, vehicle stabilization under load, and comfortable operation of the air suspension in AMG versions. Thanks to its precise fit for the rear axle, on both the left and right sides, the air spring allows for maintaining correct geometry and predictable vehicle handling.

Specifications and technical data

• SKU: A1663200625-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1663200625
• Substitutable numbers: A1663200625, A 166 320 06 25
• Location on the vehicle: Rear, Right, Left
• Category: Shocks, Struts & Assemblies

Purpose and function in the suspension system

The rear air spring in the Mercedes W166 AMG is responsible for transferring loads between the body and the wheel assembly, as well as maintaining the vehicle's set ride height. Its placement on the vehicle covers the rear axle on both the right and left sides, allowing for symmetrical operation of the entire system. A properly selected air spring reduces body roll, improves stability at higher speeds, and supports the operation of the shock absorbers, which translates into predictable handling.

Benefits of using an original air spring

Using a dedicated air spring in the AMG version allows for maintaining the factory suspension performance characteristics – from bump damping comfort to stiffness during dynamic driving. The appropriate design of the air spring:

• maintains a stable rear body height under variable loads,
• supports even force distribution on both sides of the axle,
• limits excessive bottoming out and vehicle swaying.

As a result, the suspension system remains consistent with the manufacturer's specifications, and the car's reactions to steering inputs and load changes are repeatable and easy to predict.

Integration with the damping system

The air spring from the Shock absorbers and struts category works with the rear axle shock absorbers, creating a complete assembly responsible for damping vibrations and maintaining tire contact with the road surface. A properly functioning air spring:

• ensures the appropriate operating range for the shock absorber,
• allows for maintaining the correct suspension travel,
• minimizes overloads transferred to the body.

Thanks to this, the suspension system operates within the optimal range, which is important for both ride comfort and the durability of other rear axle components.

Selection and vehicle compatibility

When selecting an air spring for the Mercedes W166 AMG, it is crucial to match it to the rear axle and the correct mounting side. This air spring model has been designed to work on both the left and right sides, which facilitates service and reduces the risk of ordering errors. The product comes from a Mercedes vehicle, which helps maintain structural compatibility with the factory suspension system.

Condition and service application

The item is offered as a used part, which is a beneficial solution for repairs where combining functionality with optimal service costs is essential. This type of air spring is suitable for replacing a damaged unit, restoring the correct operation of the rear suspension without the need to interfere with other components.

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 springs, shock absorbers, or complete struts, check the available parts in the Mercedes Shock absorbers and struts category.

To better understand the relationships between air springs, shock absorbers, and other suspension components, and to plan service work consciously, it is worth consulting our guide: Suspension system – a comprehensive guide to shock absorbers, control arms, and stabilizers.