Mercedes E-Class W211 Front Left Right Control Arm Upper Wishbone A2113300138

Mercedes E-Class W211 Front Left Right Control Arm Upper Wishbone is a component from the Control arms and ball joints group, designed for operation in the front steering axle suspension. Engineered for installation on either the left or right side, it supports precise wheel guidance, driving stability, and predictable vehicle behavior during cornering and braking.

Specifications and technical data

• SKU: A2113300138
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2113300138
• Substitutable numbers: A2113300138, A 211 330 01 38
• Location on the vehicle: Front, Left, Right
• Category: Control Arms, Ball Joints & Assemblies

Purpose and function in the suspension

The presented upper control arm works in conjunction with the suspension strut and steering knuckle, creating a rigid yet appropriately flexible wheel guidance system. Its placement on the vehicle covers the front and both sides of the axle, allowing the component to be used on both the driver and passenger sides, in accordance with the requirements of the specific suspension configuration.

Thanks to the correct geometry of the control arm and its fitment to factory mounting points, proper wheel alignment and camber angles are maintained, which translates into stable handling, even tire wear, and predictable steering response.

Compatibility and identification parameters

The control arm has been developed for the Mercedes W211 series models, adhering to the vehicle manufacturer's design requirements. The component features a dedicated OEM part number and corresponding interchangeable numbers, which facilitates clear identification in catalogs and parts selection systems, as well as minimizing the risk of ordering errors.

The presence of reference numbers allows for quick comparison with the currently installed component, as well as with service documentation, which is particularly important when working in a professional workshop or during self-repair performed in accordance with manufacturer procedures.

Performance characteristics and installation

The front upper control arm for the Mercedes W211 is designed to operate in demanding conditions typical for the suspension of an upper-mid-range vehicle. The arm's construction ensures appropriate rigidity while working in harmony with other suspension elements, such as springs, shock absorbers, and ball joints, which promotes ride comfort and steering precision.

Its placement on the vehicle, covering the front, left, and right sides, simplifies service logistics – the same type of control arm can be used on both sides of the axle, according to installation recommendations. With proper installation, using correct tightening torques and geometry checks, the component restores proper suspension operation and reduces unwanted play and knocking.

Benefits of use and technical support

Using this control arm in the front suspension of a Mercedes W211 allows for the restoration of handling stability, improved steering response, and a reduction in excessive vibrations transmitted to the body. This is particularly important in vehicles operated on roads with varying surface quality, where the suspension is exposed to repetitive dynamic loads.

To better understand the role of such components in the entire chassis system and to learn practical tips regarding diagnostics and maintenance, it is worth consulting our guide – a detailed discussion can be found in the article Suspension system – a comprehensive guide to shock absorbers, control arms, and stabilizers, which describes, among other things, issues related to control arms in the Mercedes W211.

Expanding the scope of service work

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

Choosing elements from the same functional group allows for a consistent repair, reduces the risk of recurring faults, and optimizes workshop time, which is significant for both the vehicle owner and the service center performing the work.