Mercedes W447 Rear Left N/S Suspension Leg Wheel Hub Brake Disc Caliper

Mercedes W447 Rear Suspension Knuckle Left is a precise component of the drivetrain, designed for the rear left side of the vehicle. It is responsible for stable wheel guidance, correct suspension geometry, and safe load transfer during driving. Thanks to the use of original Mercedes design, the knuckle ensures predictable vehicle behavior and a solid foundation for further suspension service work.

Specifications and technical data

• SKU: A4473505300
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A4473505300
• Substitutable numbers: A4473505300, A 447 350 53 00, A4474208000, A 447 420 80 00, A4474230412, A 447 423 04 12, BG
• Weight: 150
• Location on the vehicle: Rear, Left
• Category: Suspension Component Replacement Kits

Purpose and Function in the Suspension System

The left rear knuckle in Mercedes W447 models is a key load-bearing element to which suspension components and the wheel hub are attached. Its task is to maintain the correct position of the wheel relative to the body, preserve axle geometry, and stably transfer forces generated during acceleration, braking, and cornering.

Its placement on the vehicle on the left rear side allows for precise adaptation to the factory suspension system, minimizing the risk of geometry problems and uneven tire wear. A properly selected knuckle influences:

• maintaining correct toe and camber,
• driving stability at higher speeds,
• confident vehicle control during emergency maneuvers.

Design and Fitment for Mercedes W447

The knuckle has been specifically designed for the W447 platform, meaning full compatibility with factory mounting points and suspension operating parameters. Precise fitment to the body and rear axle facilitates installation and subsequent geometry adjustment. The element is part of the technical group Suspension Replacement Kits, making it an ideal fit for comprehensive drivetrain repairs.

The appropriately selected weight of the component ensures proper weight distribution on the rear axle, which is important for driving comfort and shock absorber operation. The knuckle works with other suspension elements, creating a cohesive, predictable system that maintains the handling characteristics intended by Mercedes engineers.

Condition, Origin, and Benefits of Use

The offered knuckle comes from the Mercedes line and is a used part, allowing for a reasonable cost while retaining the original design. For many users, this is an advantageous alternative to aftermarket replacements, especially for components responsible for geometry and driving safety.

Using this knuckle as part of a suspension replacement kit allows for:

• restoring proper vehicle handling after mechanical damage,
• eliminating play and irregularities resulting from deformation of the old component,
• obtaining a stable base for further toe and camber adjustment.

Professional Installation and Service Aspects

Due to the knuckle's importance for safety, installation in a specialized service center using appropriate tools and procedures is recommended. After installation, a full inspection of the rear axle geometry is advisable to fully utilize the potential of the newly installed element. A correctly installed knuckle reduces the risk of accelerated tire wear, improves vehicle stability, and enhances driving comfort.

If you are planning a comprehensive overhaul of the rear suspension in your Mercedes, pay attention to the compatibility of other components such as control arms, shock absorbers, or bushings, so that the entire system works cohesively and safely.

More About Suspension and Related Components

To better understand the role of the knuckle in the entire drivetrain and the relationships between shock absorbers, control arms, and stabilizers, it is worth consulting specialized technical materials – a practical addition to your knowledge will be the article Suspension System – A Comprehensive Guide to Shock Absorbers, Control Arms, and Stabilizers, which discusses key issues related to suspension diagnostics and operation.

If you are planning a more extensive repair of the rear drivetrain in your Mercedes and need compatible components, check the available parts in the Mercedes Suspension Replacement Kits category.