Mercedes W204 Control Arm Rear Lower Suspension Swing Wishbone Part A2043520888

Mercedes W204 Rear Wheel Suspension Control Arm is a component from the control arms and ball joints category, designed for the rear axle of the vehicle. Engineered as an original Mercedes part, it ensures proper suspension geometry, stable vehicle handling, and predictable road behavior. It's a practical choice for users seeking a reliable component for professional suspension system repairs.

Specifications and technical data

• SKU: A2043503506-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2043503506
• Substitutable numbers: A2043503506, A 204 350 35 06, A2043520888, A 204 352 08 88
• Location on the vehicle: Rear
• Category: Control Arms, Ball Joints & Assemblies

Purpose and Function in Suspension

The rear control arm in Mercedes W204 C-Class models is responsible for precise wheel guidance relative to the body and maintaining correct toe and camber angles. A correctly selected component limits unwanted wheel movements, which translates to:

• more stable vehicle behavior at higher speeds,
• more predictable responses to road imperfections,
• even tire wear,
• better integration with ABS and ESP systems.

The control arm mounted on the rear axle operates under demanding conditions – it handles vertical, lateral, and longitudinal loads, so its condition directly impacts driving safety and comfort.

Technical Characteristics and Fitment

The presented control arm is an original Mercedes part, meaning it retains factory geometric parameters and appropriate structural rigidity. This allows for achieving wheel alignment settings consistent with the vehicle manufacturer's specifications after installation. The component is specifically designed for the rear axle, taking into account the characteristics of the multi-link suspension used in the W204.

The design allows for the use of interchangeable part numbers, which simplifies part selection based on service documentation or manufacturer catalogs. For guaranteed fitment, it is recommended to verify using the OEM part number or the vehicle's VIN in the service catalog.

Benefits of Using an Original Rear Control Arm

Using the correct rear control arm in a Mercedes W204 offers tangible operational benefits:

• Restoration of Factory Handling Characteristics – the car behaves as intended by the manufacturer, without undesirable geometry changes.
• Improved synergy with other suspension components – shock absorbers, springs, and ball joints, enhancing the overall smoothness of the system.
• Accurate geometry alignment after repair – the service center has full adjustment capability according to factory data.
• Reduced risk of accelerated tire wear and wear of rubber-metal suspension components.

This solution is particularly recommended for comprehensive rear suspension overhauls where maintaining component integrity and achieving predictable results is crucial.

Condition, Installation, and Service Recommendations

The offered control arm is from the used parts group, allowing for an economical repair while maintaining the original manufacturer's specifications. Before installation, it is recommended to perform a standard inspection of associated components – bushings, mounting bolts, and ball joints – and replace them if they show excessive wear.

During installation, pay attention to:

• correct positioning of the control arm relative to the body and wheel hub,
• tightening bolts with the suspension loaded (after lowering the vehicle onto its wheels),
• mandatory wheel alignment after completing the work.

A repair carried out in this manner allows for the full utilization of the W204's suspension design potential and reduces the risk of subsequent play or vehicle pulling.

More About Suspension and Related Components

If you want to better understand how your car's suspension system works and the role of control arms, shock absorbers, and stabilizers, check out our guide: Suspension System – A Comprehensive Guide to Shock Absorbers, Control Arms, and Stabilizers. This is a practical source of knowledge for planning repairs and diagnostics.

If you need other elements from the control arms and ball joints category dedicated to this brand, browse the Mercedes control arms and ball joints available in our store to select a complete solution for your suspension.