Mercedes Vito W447 Brake Servo Cylinder 114 CDI 622851 Diesel A4474300300

Mercedes Vito W447 Brake Servo Cylinder 114 CDI is an original component from the Brake servos and pressure regulators group, designed for vehicles with a diesel engine. This used OEM sub-assembly ensures a factory-fit for the braking system, stable vacuum assistance, and predictable brake pedal performance.

Specifications and technical data

• SKU: RHD-A4474300300
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A4474300300
• Substitutable numbers: A4474300300, A 447 430 03 00
• Fuel type: Diesel
• Category: Brake Servos

Purpose and function in the braking system

The presented brake servo is a component designed for the Mercedes Vito W447 generation model in the 114 CDI version with a Diesel engine. It is responsible for increasing the force applied to the master brake cylinder, which translates into more effective braking with less pressure on the pedal.

In practice, this means that the driver achieves a repeatable, predictable response from the braking system, and the entire system maintains parameters close to factory specifications. Using an original servo from the same model family minimizes the risk of mechanical and hydraulic compatibility issues.

Benefits of using an original servo

Choosing an original component from the Brake servos and pressure regulators group in a used condition is a solution that allows you to maintain the braking system's design in accordance with the manufacturer's specifications. Thanks to this:

• the proper brake assistance characteristics, matched to the weight and purpose of the Vito W447, are preserved,
• the risk of improper pedal operation (too soft or too hard travel) is reduced,
• consistency with other braking system components is maintained,
• it is easier to diagnose potential future faults, as the part's parameters correspond to factory assumptions.

A used OEM component is also a reasonable compromise between repair costs and maintaining high quality and proper operation of the entire system.

Selection for the Diesel engine version

The servo has been designed to work with a Diesel power unit, which is significant for how vacuum is generated and utilized in the vehicle. Proper matching to the engine version reduces the risk of assistance efficiency problems and ensures stable operating pressure under various load conditions.

For workshops and users, this means easier installation and no need to modify the installation, hoses, or mounts. The component is prepared for operation in a braking system designed specifically for this powertrain configuration.

Condition, installation, and service application

The offered sub-assembly is in used condition, which in practice means it comes from disassembly and can be used as a replacement in the process of repairing or refurbishing the braking system. This type of part is particularly useful for:

• fixing faults related to the loss of brake assistance,
• post-accident repairs in the bulkhead area,
• fleet service, where quick availability of original components is important.

Due to its factory origin, installation proceeds in a manner similar to the manufacturer's service procedures, without the need for adapting non-standard solutions.

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 servos, brake pressure regulators, or related hydraulic sub-assemblies, check the available parts in the Mercedes Brake servos and pressure regulators category.

Technical support and service knowledge

When working with the braking system, it is worth using current service procedures and taking care of other vehicle systems, such as air conditioning or heating, which affect comfort and safety of operation. Practical tips regarding the selection of used OEM components, service schedules, and inspection of the installation status can be found in the article Air conditioning and heating – part selection and maintenance for year-round comfort.