Mercedes C215 W220 Rear Axle Control Arm Left Right N/O/S A2203521102

Mercedes C215 W220 Rear Axle Control Arm Left Right N/O/S is a precision component from the Control arms and ball joints group, designed for use on either the left or right side of the rear axle. It is responsible for stable wheel guidance, correct suspension geometry, and predictable vehicle behavior during acceleration, braking, and cornering.

Specifications and technical data

• SKU: A2203521102
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2203521102
• Substitutable numbers: A2203521102, A 220 352 11 02
• Location on the vehicle: Rear, Right, Left
• Category: Control Arms, Ball Joints & Assemblies

Purpose and function in the suspension

This rear axle control arm has been specifically designed for Mercedes luxury class models of the C215 and W220 series. Its task is to maintain the correct position of the wheel hub relative to the body, which translates into driving stability, even tire wear, and predictable steering response.

The component operates in the rear part of the vehicle, on the left or right side, as part of the multi-link suspension system. Thanks to the properly selected arm geometry, it ensures:

• control over the toe and camber of the rear axle wheels,
• better transfer of longitudinal and lateral forces,
• stable vehicle handling at higher speeds.

Construction and technical characteristics

The control arm belongs to the Control arms and ball joints group, meaning it works with flexible elements and ball joints responsible for smooth suspension movement. The arm's construction is adapted to operate in the demanding environment of the rear axle, where variable loads and vibrations resulting from road surface irregularities occur.

The original Mercedes origin helps maintain factory vehicle handling parameters and facilitates matching with other suspension components. As a result, replacing a worn part with this model allows for the restoration of original driving characteristics without the need for structural modifications.

Practical application and installation

The control arm is intended for installation on the rear axle, with the possibility of use on both sides of the vehicle. This solution simplifies part selection during repairs, especially when simultaneous replacement of elements on the left and right sides is planned.

After installation, it is recommended to perform a suspension geometry adjustment to fully utilize the potential of the newly installed control arm. Properly set toe and camber angles affect:

• driving stability on straight sections,
• confident vehicle behavior in corners,
• reduction of excessive tire wear.

Benefits of using an original Mercedes control arm

Using an original component from the suspension group in a Mercedes C215 / W220 allows for maintaining the structural integrity of the entire system. Factory fitment minimizes the risk of improper installation, play, or unwanted noises while driving. This is particularly important in high-end cars, where comfort and precision of handling are key.

The product in N/O/S (New Old Stock) condition represents a reasonable compromise between repair costs and maintaining proper suspension performance, provided it is installed correctly and followed by a geometry check.

More suspension components and technical knowledge

If you are planning a comprehensive repair or upgrade of the suspension area in your Mercedes and need other elements from the same group, such as additional arms, links, or ball joints, check the available parts in the Mercedes control arms and ball joints category.

To better understand the role of control arms in the operation of the entire chassis system and the relationships between shock absorbers, control arms, and stabilizers, it is worth checking out our guide: Suspension system – a comprehensive guide to shock absorbers, control arms, and stabilizers.