Mercedes W415 Brake Servo Booster Unit Master Cylinder Bottle Tank A4154300100

Mercedes W415 Brake Servo Booster Unit Master Cylinder Bottle Tank is a brake system component from the Brake servos and pressure regulators group, designed for Mercedes vehicles. It ensures stable hydraulic supply for the brake circuit and an adequate fluid reservoir, which translates into predictable brake pedal response and safe deceleration.

Specifications and technical data

• SKU: A4154300100-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A4154300100
• Substitutable numbers: A4154300100, A 415 430 01 00, 0204Y24321
• Category: Brake Servos

Purpose and function in the brake system

The presented master cylinder assembly with brake fluid reservoir is responsible for generating operating pressure in the brake circuits and storing the appropriate amount of working medium. In combination with the brake servo, it allows for the correct transmission of force from the pedal to the brake calipers or wheel cylinders, which is crucial for the stable operation of the braking system in the Mercedes W415 series.

This type of solution is designed to work with the factory brake pressure regulation system, ensuring compliance with the operating characteristics intended by the vehicle manufacturer. A properly selected fluid reservoir minimizes the risk of air entering the system under typical operating conditions.

Benefits of using an original Mercedes component

Using a component from the Brake servos and pressure regulators group dedicated to Mercedes allows for maintaining the factory operating parameters of the system. The original connection geometry and reservoir shape facilitate installation in the engine compartment and proper routing of brake lines and vent hoses.

Choosing an original solution instead of a replacement helps maintain consistency with other brake system components, which is important both for braking efficiency and for the subsequent diagnosis of potential faults. This is a practical solution for users who want to restore proper brake operation after a failure or wear of the previous component.

Characteristics of the used component

The offered subassembly is in used condition, meaning it has been removed from a vehicle and verified for further operational suitability. This type of part is an attractive cost-effective alternative to a new component, while maintaining structural compatibility with the factory Mercedes brake system.

When choosing a used component, it is worth paying attention to the correct selection based on the vehicle model and the solutions used within the brake system. The product has an assigned OEM part number and interchangeable numbers, which facilitates clear identification and matching to a specific car configuration.

Selection, installation, and operation

Before installation, it is recommended to verify compatibility with your vehicle based on the OEM part number and reference numbers, as well as to consult a mechanic or a service center specializing in the Mercedes brand. A properly selected master cylinder assembly with a reservoir helps reduce installation time and avoid problems with matching hydraulic connections.

After installation, it is necessary to thoroughly bleed the brake system and check all connections for leaks. Regular checking of the brake fluid level in the reservoir and periodic fluid replacement in accordance with service recommendations help maintain stable system operation and reduce the risk of internal corrosion of hydraulic components.

To better take care of the operation of components sourced from dismantling, it is worth reading practical tips on maintenance – you will find them in the article How to extend the life of used car parts?.

Expansion of brake system modernization

If you are planning a comprehensive repair or modernization of the braking zone in your Mercedes and need other elements from the same group, such as a brake servo, brake pressure regulator, or additional hydraulic components, check the available parts in the Mercedes brake servos and pressure regulators category.