Mercedes-Benz A B Class W169 W245 Brake Servo Master Cylinder A1694301430

Mercedes-Benz A B Class W169 W245 Brake Servo Master Cylinder is a factory-original brake system component, designed for precise integration with the brake hydraulic system. It offers stable assistance, predictable pedal characteristics, and compliance with the manufacturer's safety requirements. As a result, it serves as a functional solution for repairing or restoring factory braking performance in these models.

Specifications and technical data

• SKU: A1694301430
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1694301430
• Substitutable numbers: A1694301430, A 169 430 14 30, KZ
• Category: Brake Servos

Purpose and compatibility with the brake system

The presented brake servo integrated with the master cylinder has been developed specifically for Mercedes A-Class W169 and B-Class W245 models. The design is adapted to the engine bay geometry of these bodies and the factory brake force distribution, which facilitates installation and helps maintain the original feel of the brake pedal operation.

The component belongs to the Brake servos and proportioning valves group, responsible for the correct translation of the driver's foot pressure into pressure within the brake circuits. Using a dedicated component from this brand reduces the risk of issues with bleeding, non-linear pedal feel, or incorrect brake force distribution between the axles.

Construction and function in the brake system

The brake servo uses vacuum to assist the pressure applied to the pedal, allowing the driver to achieve significantly lighter yet predictable system operation. The integrated master cylinder is responsible for generating pressure in the brake circuits, which translates into effective operation of the calipers and drums.

This combination in a single assembly ensures:

• consistent operation of the brake assistance and hydraulics,
• reduction in the number of connections and potential leak points,
• easier diagnostics and replacement during service.

By maintaining the original design, the brake system can operate within the parameters specified by the manufacturer, which is important for both safety and driving comfort.

Characteristics of the used product

The offered item is a used part, sourced from the dismantling of a Mercedes vehicle. Such components are frequently chosen for repairs of older vehicles, where a combination of structural compatibility and reasonable cost is key. A properly selected brake servo with a master cylinder allows for restoring correct system operation without the need for costly installation modifications.

To maintain stable operating parameters, installation in a specialized workshop is recommended, following proper bleeding and leak check procedures. It is also good practice to periodically check the condition of the brake fluid and lines, which supports long-term, safe operation.

If you want to better care for the durability of installed used components, it is worth reading the practical tips included in the article How to extend the life of used car parts?, which describes, among other things, the principles of maintaining mechanical and hydraulic elements.

Benefits of using an original Mercedes servo

Using an original brake servo and master cylinder assembly in a Mercedes A-Class or B-Class provides a number of practical benefits:

• Factory fit – maintaining the original mounting geometry and brake pedal rod length.
• Consistent braking characteristics – the system operates according to the manufacturer's specifications, which makes the vehicle easier to control.
• Reduction of installation problems – no need for adaptation, custom mounts, or line modifications.
• Economical repair – particularly beneficial when servicing older vehicles, where the cost-to-functionality ratio is important.

For owners of older models who encounter difficulties with the availability of new components, an interesting addition to your knowledge may be the guide No parts at the dealership? How to handle repairs of older models using used parts, which describes a practical approach to repairs using original used elements.

Expanding the brake system in a Mercedes

If you are planning a comprehensive repair or upgrade of the braking area in your Mercedes and need other elements from the same group, such as additional servos, brake proportioning valves, or compatible assistance modules, check the available parts in the Mercedes brake servos and proportioning valves category.