Mercedes Vito W447 Brake Servo Booster Master Cylinder Braking Unit A4474300508

Mercedes Vito W447 Brake Servo Booster Master Cylinder Braking Unit in the form of a complete servo unit with a master brake cylinder is a key component of the braking system, responsible for the stable transfer of pedal pressure force into pressure within the brake circuits. This brake servo and master cylinder assembly has been designed specifically for the Mercedes Vito W447 generation models, ensuring proper operating parameters and compliance with factory braking characteristics.

Specifications and technical data

• SKU: A4474300508
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A4474300508
• Substitutable numbers: A4474300508, A 447 430 05 08
• Category: Brake Servos

Purpose and function in the braking system

The presented brake servo unit with master cylinder is responsible for braking force assistance and precise metering of pressure in the brake lines. Combined with vacuum from the engine or vacuum pump, the servo reduces the driver's effort on the pedal, and the integrated master cylinder distributes pressure to the front and rear axle circuits, maintaining the stable braking characteristics typical of the Mercedes Vito W447.

The properly selected geometry and piston stroke in this unit allow for maintaining a predictable brake pedal response, which translates into safe, repeatable deceleration both in city driving and under highway conditions.

Benefits of using an original servo assembly

Using a complete servo unit with a master cylinder dedicated to the Vito W447 provides a number of practical benefits:

• preservation of factory brake pedal characteristics and braking efficiency,
• proper fitment to bulkhead mounts and brake line layout,
• reduction of the risk of leaks and system bleeding issues,
• consistency with the factory braking force correction system.

Thanks to this, the complete servo and brake force regulator assembly constitutes a technically safe solution for repairs following a failure, a drop in braking efficiency, or problems with a hard or sinking pedal.

Component condition and installation aspects

The offered unit comes from dismantling and has the status of a used part, which allows for an economical repair while maintaining the manufacturer's original design. Before installation, a standard workshop procedure is recommended: leak testing, checking piston operation, and thorough system bleeding after installation in the vehicle.

Due to the integrated design of the servo with the master cylinder, the replacement is carried out in a single installation process, which facilitates the mechanic's work and reduces vehicle downtime. A correctly installed assembly restores full brake assistance functionality and stable pressure in the circuits.

Part selection by numbers and compatibility

The component should be selected based on vehicle data as well as information from the rating plate and service documentation, paying attention to compatibility with the braking system of the specific Mercedes Vito W447 version. The product features OEM markings and interchangeable numbers, which facilitates compatibility verification in the manufacturer's catalogs and part selection systems.

In case of doubts regarding application in a given body configuration or engine version, consultation with a mechanic or comparison with the currently installed servo and master cylinder assembly in the vehicle is recommended.

Expanding the braking system in the Mercedes Vito

If you are planning a comprehensive repair or upgrade of the braking zone in your Mercedes and need other elements from the same group, such as additional servos, brake force regulators, or complete assistance modules, check the available parts in the Mercedes Brake Servos and Regulators category.

To maximize the potential of the used servo and master cylinder assembly and other braking system components from dismantling, it is worth ensuring their proper maintenance and operation. Practical tips on maintaining the good condition of aftermarket components can be found in the article How to extend the life of used car parts?, which discusses proven methods of caring for mechanical subassemblies and vehicle system components.