Mercedes GLA X156 Front Transverse Control Arm Bottom Left N/S A1563300100

Mercedes GLA X156 Front Transverse Control Arm Bottom Left N/S is a component from the Control arms and ball joints group, designed for operation in the front suspension on the driver's side. Engineered as part of the original chassis design, it ensures precise wheel handling, driving stability, and predictable vehicle behavior during braking and cornering.

Specifications and technical data

• SKU: A1563300100
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1563300100
• Substitutable numbers: A1563300100, A 156 330 01 00
• Location on the vehicle: Front, Left
• Category: Control Arms, Ball Joints & Assemblies

Purpose and vehicle placement

The presented control arm operates in the front suspension on the left side, responsible for maintaining proper wheel geometry and a stable connection between the hub and the body. Its placement on the front axle means the component has a direct impact on:

• driving precision at higher speeds,
• steering system response to steering wheel inputs,
• even tire wear,
• damping of vibrations transmitted from the road to the body.

Thanks to appropriately selected geometry and mounting points, the control arm works with other suspension components to create a cohesive, predictable chassis system characteristic of the Mercedes brand.

Technical and functional characteristics

The lower transverse control arm in this model is responsible for maintaining a constant wheel position relative to the body while allowing the suspension to move vertically. The design intended for the front axle and left side ensures:

• stable wheel guidance in the horizontal plane,
• control over toe and camber changes under load,
• cooperation with ball joints and other system components.

Proper fitment to the specific axle and side of the vehicle minimizes stress at mounting points and reduces the risk of improper suspension operation. This solution allows for maintaining factory driving characteristics, which translates into safe and predictable handling.

Benefits of using an original Mercedes control arm

Using an original control arm in the GLA X156 model allows for maintaining the structural integrity of the entire suspension. Key advantages include:

• Factory fitment – compatibility with mounting points and geometry specified by the manufacturer.
• Stable vehicle handling – maintaining proper wheel geometry after correct installation and wheel alignment.
• Optimal cooperation with ball joints and other elements from the Control arms and ball joints group.
• Possibility to restore original driving characteristics after damage or wear of the previous component.

The element from this group is particularly important in vehicles operated on roads with poorer surface quality, where the suspension is exposed to increased dynamic loads.

Product condition and practical application

The offered control arm is a used component, which allows for economical suspension repair while maintaining the original design. This type of solution is often chosen in the case of:

• post-accident repairs within the front suspension,
• mechanical damage after hitting an obstacle,
• the need for a quick replacement of a single chassis component.

After installation, it is recommended to perform a wheel alignment check to fully utilize the potential of the newly installed control arm and ensure even tire wear and stable handling.

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

Technical support and knowledge about the suspension system

To better understand the role of control arms in the operation of the entire chassis system and to consciously plan inspections and repairs, it is worth referring to specialized materials. Practical information on diagnostics, signs of wear, and operating principles can be found in the article Suspension system – a comprehensive guide to shock absorbers, control arms, and stabilizers, which discusses the relationships between individual suspension components and their impact on driving safety.