Mercedes R172 Brake Servo Fluid Reservoir Expansion Tank Bottle A1724300102

Mercedes R172 Brake Servo Fluid Reservoir Expansion Tank Bottle is an original brake system component designed to function as a brake fluid reservoir and tank in vehicles of this series. It ensures a stable supply to the brake master cylinder and servo, which translates into predictable brake pedal response and safe vehicle operation. This is a practical solution for users looking for a factory-spec component with a proven design.

Specifications and technical data

• SKU: A1724300102
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1724300102
• Substitutable numbers: A1724300102, A 172 430 01 02
• Category: Reservoirs & Caps

Purpose and function in the brake system

The presented reservoir operates in the area of the brake servo and master cylinder, responsible for storing and stabilizing the brake fluid level. Its task is to maintain an adequate reserve of the working medium so that the brake system maintains full efficiency during typical operation as well as during more intensive vehicle use. The reservoir's design is adapted to the specific layout of components in the engine compartment of Mercedes R-series models, which facilitates installation and subsequent maintenance.

Benefits of using an original reservoir

Using an original expansion tank in a Mercedes brake system provides a number of practical benefits:

• factory fitment for the specific model's brake master cylinder and servo,
• predictable brake fluid level behavior under various operating conditions,
• easy access to the cap and ports during maintenance,
• maintaining the structural integrity of the entire brake system.

As a result, the brake system retains factory-like parameters, and maintenance – such as bleeding or periodic fluid replacement – is carried out in an orderly and repeatable manner.

Performance characteristics and installation

The offered item comes from the Brake fluid reservoirs and caps group, meaning it is designed to work with typical hoses and equipment used in Mercedes brake systems. The reservoir's design includes integrated mounts and connection ports, which facilitates its placement in the engine compartment and connection to the existing installation. In practice, this translates into shorter installation time and reduced risk of leaks resulting from improper fitment.

The product is a used item, which in the case of original Mercedes parts often allows for a favorable balance between build quality and purchase cost. For many users, this is a sensible way to restore full functionality to the brake system while maintaining factory component specifications.

Selection and safety of using pre-owned brake components

When choosing a used expansion tank for the brake system, it is crucial to pay attention to structural compatibility with the specific vehicle model and the condition of the connection elements. A properly selected reservoir helps maintain system tightness, correct fluid circulation, and a stable level of the working medium, which has a direct impact on braking safety. It is also worth remembering to regularly check the fluid level and adhere to replacement intervals to fully utilize the potential of the entire system.

If you want to deepen your knowledge on the conscious selection of brake components from the secondary market, our blog guide will be helpful: second-hand brake system – how to safely choose discs, calipers, and ABS. You will find a practical checklist there that makes it easier to assess the condition of used parts before installation.

Expanding Mercedes brake system upgrades

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 reservoirs, caps, or related hardware, check out the available parts in the Mercedes brake fluid reservoirs and caps category.

Summary

Mercedes R172 Brake Servo Fluid Reservoir Expansion Tank Bottle is a practical choice for users who want to restore the proper operation of the brake system using an original component. A properly selected and installed reservoir supports the stable operation of the brake master cylinder and servo, thereby improving the vehicle's predictable response during braking. This is a solution that allows you to maintain the structural consistency of the Mercedes brake system with a rational approach to service costs.