Mercedes C118 W177 W247 Brake Servo Booster Master Cylinder Braking A2474300800

Mercedes C118 W177 W247 Brake Servo Booster Master Cylinder Braking is a factory-original brake system component responsible for stably converting the pressure applied to the brake pedal into hydraulic pressure within the system. Thanks to the precise design characteristic of the Mercedes brand, it ensures predictable vehicle response and comfortable braking force modulation, which is crucial for both daily driving and emergency situations.

Specifications and technical data

• SKU: RHD-A2474300800
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2474300800
• Substitutable numbers: A2474300800, A 247 430 08 00
• Category: Brake Servos

Purpose and function in the braking system

The described brake servo and master cylinder assembly is part of the Brake Servos and Proportioning Valves category, responsible for assisting the force applied to the pedal and ensuring proper pressure distribution in the brake circuits. In Mercedes C118, W177, and W247 vehicles, this module:

• reduces the force the driver needs to apply to the brake pedal,
• stabilizes pressure in the system, which translates into repeatable, predictable braking,
• works with safety systems (ABS, ESP, brake assist) to ensure they operate under optimal conditions,
• improves driving comfort through linear brake pedal characteristics.

Construction and advantages of the original Mercedes solution

The brake servo integrated with the master cylinder in this model is designed as a complete, sealed solution that reduces the risk of leaks and simplifies installation. The original Mercedes design ensures:

• precise fitment to the bulkhead mounts and pedal assembly,
• correct positioning of the brake line connection ports,
• consistency with factory brake assist system calibration,
• retention of factory pedal travel and firmness, which helps the driver feel the vehicle.

As a result, replacing it with an original component from the same design group allows you to maintain braking characteristics in line with the manufacturer's specifications without the need for additional modifications.

Condition, selection, and practical application

The item is sourced from disassembly and is offered as a used brake system component, providing a cost-effective solution while maintaining factory specifications. In practice, this choice is particularly effective for:

• post-accident repairs in the bulkhead area,
• servo damage manifesting as a hard brake pedal or uneven assist operation,
• the need to replace the complete assembly due to master cylinder leaks.

To ensure proper selection, it is worth verifying compatibility with the specific engine version and model year of the vehicle, as well as comparing the design of the mounts and connections with the currently installed part.

Installation and maintenance recommendations

When replacing the servo and master cylinder, it is recommended to perform several additional service procedures that increase the reliability of the entire braking system:

• thorough bleeding of all brake circuits after installation,
• checking the condition of flexible and rigid brake lines,
• verifying brake pedal operation in terms of free play and firmness,
• checking connections for leaks at maximum operating pressure.

To maintain the performance of a used component for a longer period, it is worth using fresh brake fluid of the appropriate grade and regularly checking its condition. Practical tips on using parts from disassembly can be found in the article How to extend the life of used car parts?, which describes proven maintenance and diagnostic methods.

Expanding the Mercedes braking system

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, proportioning valves, or compatible assist modules, check out the available parts in the Mercedes Brake Servos and Proportioning Valves category.