Brake Servo Mercedes W415 Citan Booster Unit Master Cylinder 0204828684

Brake Servo Mercedes W415 Citan Booster Unit Master Cylinder is a factory-original brake system component, designed specifically for the Mercedes Citan W415 series models. This used unit provides stable braking force assistance, improving pedal feel and braking precision during daily operation.

Specifications and technical data

• SKU: A4154300100
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A4154300100
• Substitutable numbers: A4154300100, A 415 430 01 00, A4154300002, A 415 430 00 02, A4154300000, A 415 430 00 00, 0 204 828 684, 0204828684
• Category: Brake Servos

Purpose and function in the braking system

The described brake servo set integrated with the master cylinder belongs to the Brake Servos and Proportioning Valves category, responsible for increasing the force applied to the master cylinder pistons when the brake pedal is pressed. Thanks to vacuum assistance, the driver experiences a significantly lighter pedal stroke, and the braking system reacts faster and more predictably.

In practice, this translates to:

• more linear brake response at various speeds,
• better vehicle control during emergency braking,
• reduced driver fatigue during city driving with frequent braking.

Original fitment for Mercedes Citan W415

The brake servo was designed by the vehicle manufacturer with the specifics of the W415 platform in mind, which means factory-perfect fitment to the engine bay geometry, mounting points, and brake line layout. Using an original solution allows for maintaining the performance parameters intended by Mercedes engineers, without the need for modifications or adaptations.

The component is particularly recommended for:

• replacing a worn or leaking brake servo,
• post-collision repairs in the bulkhead area,
• comprehensive brake system restoration in a Mercedes Citan W415.

Operational and installation characteristics

As a used part, the brake servo with master cylinder represents an economical yet technically sound service solution for vehicles used intensively, e.g., in courier companies or service fleets. The "plug & play" design allows for installation in place of the factory component, while maintaining original line routing and brake pedal connections.

Before installation, standard service procedures are recommended, such as:

• verifying the vacuum system for leaks,
• checking the condition of brake lines and hoses,
• bleeding the system after connecting the master cylinder.

Benefits of using an original brake servo

Using an original brake servo in a Mercedes Citan W415 allows you to maintain factory safety parameters while reducing repair costs by utilizing salvaged parts. Stable brake assistance improves driving comfort, especially in city traffic and frequent stop-and-go conditions, while a properly functioning master cylinder supports even pressure distribution in the brake circuits.

If you are planning a comprehensive repair or upgrade of the braking zone in your Mercedes and need other components from the same group, such as servos, proportioning valves, or complete booster modules, check out the available parts in the Mercedes Brake Servos and Proportioning Valves category.

How to maintain used brake system components

To maximize the potential of a used brake servo, it is worth performing regular brake system inspections, checking fluid levels, and periodically inspecting lines and calipers. It is also good practice to use brake fluid with specifications consistent with the vehicle manufacturer's recommendations.

Practical tips on the operation and maintenance of salvaged components can be found in the article How to extend the service life of used car parts?, which discusses, among other things, the principles of caring for brake system components, suspension, and other key sub-assemblies.