Mercedes-Benz C CLK Class W203 C209 Brake Servo Master Cylinder A0054309630

Mercedes-Benz C CLK Class W203 C209 Brake Servo Master Cylinder is an original braking system component designed for C-Class and CLK-Class models. This complete servo assembly with the master brake cylinder ensures stable, predictable brake pedal operation and helps maintain proper system pressure, resulting in safe and comfortable braking. Thanks to the factory Mercedes design, the part is precisely matched to the body geometry and braking system of these models.

Specifications and technical data

• SKU: rhd-A0054309701-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0054309701
• Substitutable numbers: A0054304930, A 005 430 49 30, A0054309701, A 005 430 97 01, A2034303002, A 203 430 30 02, A0054305630, A 005 430 56 30, A0054309630, A 005 430 96 30, BG
• Category: Brake Servos

Purpose and function in the braking system

The brake servo integrated with the master cylinder is responsible for amplifying the pressure force on the pedal and transmitting it to the hydraulic circuits. In practice, this means less driver effort during braking and better vehicle control in typical and emergency road situations. Using an original Mercedes solution allows for maintaining factory operating parameters, including pedal travel characteristics and linear pressure buildup.

The component belongs to the Brake Servos and Proportioning Valves group, i.e., sub-assemblies responsible for the proper distribution of braking force between axles and stable pressure maintenance in the system. A properly functioning servo with a master cylinder is crucial for brake efficiency, especially in mid-range and premium vehicles such as the Mercedes C-Class and CLK-Class.

Original origin and compatibility

The presented assembly was designed by Mercedes specifically for the W203 and C209 platform, which ensures:

• factory fitment to bulkhead mounts and pedal assembly,
• proper cooperation with the hydraulic brake system,
• compliance with ABS/ESP operating parameters intended for these models.

As a result, installation is similar to a factory replacement, without the need for structural modifications. Using an original servo assembly with a master cylinder reduces the risk of issues with bleeding, leaks, or incorrect brake pedal operation.

Performance characteristics and benefits of use

Choosing this Mercedes-Benz C CLK Class W203 C209 Brake Servo Master Cylinder allows you to restore the correct braking characteristics of your vehicle. The most important benefits include:

• stable pressure in the braking system during repetitive braking cycles,
• more predictable vehicle response to pedal pressure,
• preservation of the factory brake "feel," which is important for dynamic driving,
• consistency with other braking system components specified by the manufacturer.

The component from the Brake Servos and Proportioning Valves category is of particular importance in vehicles equipped with advanced safety systems, where correct pressure values and system response times are crucial for the operation of driver assistance systems.

Condition, origin, and operation of the used component

The offered servo assembly with master cylinder is a used part, sourced from vehicle dismantling. Such a component, with proper maintenance and regular brake fluid changes, can still provide stable operating parameters in daily use. Before installation, a standard service procedure is recommended, including checking the system for leaks, inspecting hoses, and thoroughly bleeding the system.

To maximize the potential of a used braking system component and other dismantled parts, it is worth checking out practical maintenance and operation tips. Detailed advice can be found in the article How to extend the life of used car parts?, which describes, among other things, good practices regarding the installation and servicing of mechanical components.

Braking system expansion and selection of related components

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 additional servos, brake proportioning valves, or related assistance modules, check out the available parts in the Mercedes Brake Servos and Proportioning Valves category.

When choosing used braking system components, many drivers have doubts about the durability and safety of such solutions. The guide Used car parts: Myths and facts you need to know will help dispel these concerns, discussing what to look for when buying and how to make informed decisions regarding the installation of dismantled sub-assemblies.