Mercedes-Benz A B Class W169 W245 Brake Servo Master Cylinder A1694300301

Mercedes-Benz A B Class W169 W245 Brake Servo Master Cylinder is a key component of the braking system, responsible for the stable transfer of force from the pedal to the calipers. The offered brake servo and master cylinder set from the Brake Servos and Pressure Regulators category has been designed specifically for compact Mercedes-Benz models, ensuring predictable system response and comfortable brake force modulation. This is an OEM solution that allows you to restore the factory performance parameters of the braking system without compromise.

Specifications and technical data

• SKU: A1694300301
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1694300301
• Substitutable numbers: A1694300301, A 169 430 03 01, A1694301230, A 169 430 12 30, A1694300202, A 169 430 02 02, EM
• Category: Brake Servos

Purpose and function in the braking system

The brake servo and master cylinder in the Mercedes-Benz A B Class W169 W245 is responsible for assisting the pressure force on the pedal and precisely distributing pressure in the brake circuits. A correctly selected component from this group:

• stabilizes system pressure during emergency braking,
• facilitates brake force modulation in city traffic and on the highway,
• supports the operation of safety systems (ABS, ESP) through predictable pressure characteristics.

Thanks to the maintenance of the factory design, the braking system remains consistent with other components, which translates into safe and repeatable vehicle response in emergency situations.

Benefits of using an original Mercedes component

The original Mercedes brake servo and master cylinder has been designed for the specific A/B-Class platform, which ensures:

• precise fitment to the engine bay mounts and geometry,
• compliance with factory brake pedal characteristics,
• consistency with the software of driving assistance systems.

Choosing an original component from the Brake Servos and Pressure Regulators group reduces the risk of problems with bleeding, leaks, or incorrect pedal operation after installation. This is particularly important in Mercedes-class vehicles, where the braking system is precisely tuned to the vehicle's electronics.

Condition, verification, and preparation for installation

The offered element is in used condition, which allows for economical repair while maintaining an OEM component. Before being listed, such sub-assemblies are typically:

• visually verified for mechanical damage to the housing and ports,
• checked for potential brake fluid leaks,
• assessed for completeness from an installation perspective.

A brake servo and master cylinder set prepared in this way allows for shorter repair times and facilitates workshop work, as it constitutes a coherent mounting module for the given Mercedes-Benz model.

Selection, compatibility, and technical aspects

To correctly select a brake servo and master cylinder for a specific A-Class or B-Class version, it is worth paying attention to:

• compatibility with the body generation (W169 / W245),
• the type of braking system used in the vehicle,
• the presence of assistance systems that interact with system pressure.

The product has a dedicated OEM part number and associated replacement numbers, which facilitates compatibility verification in service catalogs and parts selection systems. Thanks to this, you can precisely confirm that a given unit will be suitable for a specific vehicle configuration, minimizing the risk of incompatibility.

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, pressure regulators, or related assistance modules, check the available parts in the Mercedes Brake Servos and Pressure Regulators category.

Technical support and operation

When working on the braking system, it is worth remembering to regularly change the brake fluid, properly bleed the circuits, and check for leaks after installation. For a fuller understanding of the principles of selecting used OEM components and their maintenance in the context of comfort and safety, the following article may be helpful: Air conditioning and heating – parts selection and maintenance for year-round comfort, which discusses a practical approach to operating vehicle systems.

Additional arguments for choosing original used components for this brand are provided in the entry: Mercedes – comfort, prestige, and durability. Why is it worth choosing original used parts?, which describes how to combine durability, safety, and reasonable service costs in Mercedes-Benz cars.