Description
The Mercedes W212 Front Lower Control Arm (Right) is an original suspension component from the Control Arms and Ball Joints group, designed for the front right lower suspension mounting point. Precise geometry and factory fitment for Mercedes construction ensure stable handling, predictable vehicle behavior, and proper cooperation with other suspension components.
Specifications and technical data
- SKU: A2123304000
- Mark: Mercedes (Genuine OE)
- Condition: Used
- OEM Part Number: A2123304000
- Substitutable numbers: A2123304000, A 212 330 40 00, BG
- Location on the vehicle: Front, Right
- Category: Control Arms, Ball Joints & Assemblies
Purpose and Function in the Suspension System
The presented control arm is responsible for maintaining the correct geometry of the front suspension on the right side, in the lower part of the mounting assembly. As a wheel guiding element, it stabilizes its position relative to the body, transfers loads from the road to the chassis, and works with the shock absorber, spring, and ball joints. A correctly selected control arm limits unwanted play, improves steering precision, and contributes to even tire wear.
Compatibility and Fitment for Mercedes
The control arm has been specifically designed for the Mercedes W212 platform, which means maintaining factory mounting points, appropriate arm length, and correct ball joint operating characteristics. Thanks to this, after installation, it is possible to achieve camber and toe angles consistent with the manufacturer’s specifications, without the need for modifications to other suspension elements.
The placement on the vehicle, identified as front – right side, allows for unambiguous identification of the mounting position and avoids errors when selecting mirrored parts. This is particularly important when working with multi-link suspension systems, where each element has a specific, clearly defined function.
Performance Characteristics and Benefits of Installation
The control arm, as a key component of wheel guidance, directly influences:
- driving stability during braking and acceleration,
- steering system response to steering wheel movements,
- damping of vibrations transmitted from the road surface to the body,
- even tire loading throughout the suspension’s operating range.
Choosing an original control arm dedicated to Mercedes allows for maintaining the structural integrity of the drivetrain, which translates into predictable vehicle handling and easier diagnosis of potential future faults. Precise fitment minimizes the risk of incorrect installation and reduces service time.
Component Condition and Service Application
The offered control arm is a used aftermarket part, making it an attractive solution for economical repairs, single-component replacements after a collision, or phased suspension overhauls. This type of component is suitable for workshops specializing in the Mercedes brand, as well as independent service centers looking for a cost-effective yet structurally compliant solution.
Suspension System 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 mounting elements, check the available parts in the category Mercedes Control Arms and Ball Joints.
To better understand the relationships between shock absorbers, control arms, and stabilizers, and their impact on driving safety, it is worth consulting the technical guide: Suspension System – A Comprehensive Guide to Shock Absorbers, Control Arms, and Stabilizers. This will help you more easily plan the scope of service work and select the appropriate components for your car.
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