Mercedes W639 Brake Pedal Assembly Automatic Gearbox A6392900518

Mercedes W639 Brake Pedal Assembly Automatic Gearbox is an original braking control system component designed for vehicles of this series equipped with an automatic transmission. Thanks to its factory design, it ensures correct pedal operating geometry, proper leverage of the pressure force, and compatibility with the factory body mounting points. It is a practical solution for post-collision repairs, replacing a worn-out mechanism, or interior conversions.

Specifications and technical data

• SKU: RHD-A6392900518
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6392900518
• Substitutable numbers: A6392900518, A 639 290 05 18
• Gearbox type: Automatic
• Category: Pedal Assemblies, Pads & Parts

Purpose and function in the braking system

The presented Mercedes W639 Brake Pedal Assembly is a component from the Pedals, pedal pads, and footrests group, responsible for transferring force from the driver's foot to the braking system and interacting with the automatic transmission equipment. The construction is adapted to the characteristics of Mercedes W639 vehicles, which facilitates maintaining the factory pedal travel, appropriate resistance, and predictable vehicle response during braking.

The version intended for automatic transmission takes into account the specific requirements of such a configuration, including different ergonomics of the driver's footwell and a different layout of the remaining pedals. This allows for maintaining a comfortable driving position and consistency with the original cabin design.

Construction and fitment for Mercedes W639

The Mercedes W639 Brake Pedal Assembly has been designed as a complete unit mounted to the factory mounting points in the body. The properly selected lever ratio and pedal arm geometry ensure repeatable, predictable operation of the braking system, which is important for both safety and driving comfort.

The original origin of the component promotes consistency with other system components, such as the brake booster, master cylinder, or sensors interacting with the vehicle's electronics. As a result, the Mercedes W639 Brake Pedal Assembly can be used as a replacement for the factory-installed component without the need for structural modifications.

Performance characteristics and advantages of use

As a used part, the Mercedes W639 Brake Pedal Assembly represents a reasonable compromise between repair costs and maintaining the vehicle's original specifications. Choosing such a solution allows for cost reduction while maintaining factory fitment and compatibility with the braking system and automatic transmission.

Key benefits of using this component in a Mercedes W639 include:

• maintaining the original ergonomics of the brake pedal operation,
• fitment for systems with an automatic transmission,
• no need for adapting body mounts,
• consistency with the factory interior and control system design.

Using a used part in professional repair

In many professional workshops, the use of original, used components is a conscious choice that allows for maintaining high repair quality at controlled costs. This applies particularly to mechanical elements, such as the Mercedes W639 Brake Pedal Assembly, where maintaining proper geometry and compatibility with the vehicle's construction is crucial.

If you want to learn more about the advantages of using verified recycled components in the braking system, it is worth checking out our guide: Brake calipers under the microscope – how to reduce braking system repair costs by choosing verified recycled parts. This will allow you to better plan the service strategy for your vehicle.

Expanding repairs within the brake control system

If you are planning a comprehensive repair or upgrade of the brake control zone in your Mercedes and need other elements from the same group, such as additional pedals, pedal pads, or driver footrests, check out the available parts in the Mercedes Pedals, pedal pads, and footrests category.