Mercedes W166 Rear Wishbone Track Trailing Control Arm Left N/S A1663500306

Mercedes W166 Rear Wishbone Track Trailing Control Arm Left N/S is an original component from the Control arms and ball joints group, designed for operation in the rear, left part of the suspension. Thanks to its factory geometry and design tailored to the W166 platform, the control arm ensures stable vehicle handling and predictable body behavior while driving.

Specifications and technical data

• SKU: A1663500306
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1663500306
• Substitutable numbers: A1663500306, A 166 350 03 06
• Location on the vehicle: Rear, Left
• Category: Control Arms, Ball Joints & Assemblies

Purpose and placement in the suspension

The presented control arm operates in the rear axle area on the left side, responsible for precisely maintaining wheel geometry and controlling the swinging movement of the hub. The Rear – left placement means that the component forms part of the key wheel mounting points, influencing toe, camber, and vehicle stability during acceleration, braking, and cornering.

Thanks to a design tailored to the specifics of the Mercedes W166 series suspension, the control arm works with other system components, such as springs, shock absorbers, and other arms, creating a cohesive, predictable chassis system.

Benefits of using an original Mercedes control arm

Using an original control arm in the W166 model allows for maintaining factory handling parameters and ride comfort. This component:

• maintains proper rear axle suspension geometry,
• limits unwanted wheel displacement relative to the body,
• supports even tire wear,
• influences the effectiveness of safety systems (ABS, ESP) through stable wheel guidance.

For the user, this means more confident vehicle behavior on uneven surfaces, better control in corners, and predictable vehicle response to steering inputs.

Product characteristics and condition

The control arm comes from a Mercedes vehicle and is an aftermarket component in used condition. This type of component is a good solution for drivers who want to restore proper suspension operation while maintaining reasonable service costs, while simultaneously benefiting from the manufacturer's original design.

Thanks to the preservation of the factory shape and mounting points, installing the control arm in the rear, left part of the suspension does not require structural modifications – after installation, it is recommended to perform a wheel alignment to fully utilize the potential of the chassis system.

Selection and compatibility of the component

To correctly select the control arm for a specific vehicle version, it is worth using identifiers such as SKU or OEM part number, and if necessary, also available interchangeable numbers. This allows for verifying compatibility with a specific suspension configuration and avoiding installation problems.

Information about the placement on the vehicle makes it easier to identify the correct arm in the case of a multi-link rear axle construction, where there are several different elements with a similar shape but different functions.

Suspension service expansion 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 control arms, ball joints, or mounting elements, check the available parts in the Mercedes control arms and ball joints category.

Before replacing or diagnosing suspension components, it is worth expanding your knowledge about the operation of the entire system – the article "Suspension system – a comprehensive guide to shock absorbers, control arms, and stabilizers" will be helpful, in which practical aspects of operation and servicing of key components responsible for safety and ride comfort are discussed.