Control Arm Mercedes W203 W210 Wishbone Rear Axle Left Right N/O/S A2103503306

Mercedes W203 W210 Upper Control Arm Left Right Rear is a component from the Control Arms and Ball Joints group, designed for the rear axle of the vehicle. The control arm's construction ensures stable wheel guidance, precise suspension geometry maintenance, and predictable vehicle behavior during braking and cornering.

Specifications and technical data

• SKU: A2103503306
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2103503306
• Substitutable numbers: A2103503306, A 210 350 33 06
• Location on the vehicle: Rear, Right, Left
• Category: Control Arms, Ball Joints & Assemblies

Purpose and Placement in the Suspension

The presented upper control arm operates in the rear part of the suspension, on the left or right side, allowing for flexible application depending on service needs. Its placement in the rear axle area means this component is responsible for:

• maintaining the correct position of the wheel hub relative to the body,
• controlling wheel toe and camber,
• driving stability under load and during dynamic maneuvers.

Thanks to its appropriately selected geometry, the control arm works with other suspension components, limiting unwanted wheel movements and improving the predictability of the car's reactions.

Technical and Functional Characteristics

The upper control arm in this model has been designed for operation in demanding conditions typical for Mercedes vehicles. The rigid construction of the arm and integrated mounting points allow for the transfer of vertical and lateral loads without excessive deformation, which translates to:

• more confident rear axle handling,
• reduced play in the suspension,
• better cooperation with shock absorbers and springs.

The element belongs to the Control Arms and Ball Joints group, meaning it is responsible for key moving connections in the suspension system, directly influencing ride comfort and the efficiency of force transfer between the wheel and the body.

Benefits of Application in Mercedes W203 / W210

Using this control arm on the rear axle of W203 and W210 models allows for the restoration of correct suspension operating characteristics. In practice, this means:

• more stable vehicle behavior during lane changes,
• reduced "wandering" of the rear of the car at higher speeds,
• less uneven tire wear resulting from incorrect geometry.

For the user, this translates to a higher level of safety, more predictable car reactions, and comfortable, smooth suspension operation during daily use.

Component Condition and Installation Aspects

The offered control arm is a used element, which is a cost-effective solution while maintaining the required functionality in the suspension system. This type of part is particularly attractive when several components need to be replaced simultaneously, and budget optimization is a priority.

The control arm is designed for installation on the rear axle on the left or right side, which simplifies selection during servicing. After installation, it is recommended to perform a suspension geometry adjustment to fully utilize the potential of the newly installed component and ensure even tire wear.

Suspension Service Expansion and Educational Materials

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

To better understand the relationships between shock absorbers, control arms, and stabilizers, and to plan service work consciously, it is worth consulting an expert guide: Suspension System – A Comprehensive Guide to Shock Absorbers, Control Arms, and Stabilizers. This will help you assess when the replacement of a single control arm should be supplemented with additional actions within the entire suspension system.