Mercedes W164 Brake Servo Unit Brake Cylinder Reservoir A1644280015

The Mercedes W164 Brake Servo Fluid Reservoir is an original component of the brake assist system, designed for W164 series models. As part of the Brake Boosters and Proportioning Valves group, it is responsible for stable fluid storage in the servo circuit, which translates to predictable brake pedal operation and safe braking force application. A used OEM component is a sensible choice for professional repairs or restoring the factory configuration of the braking system in Mercedes vehicles.

Specifications and technical data

• SKU: A1644280015
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1644280015
• Substitutable numbers: A1644280015, A 164 428 00 15
• Category: Brake Servos

Purpose and Function in the Braking System

The brake servo fluid reservoir in the Mercedes W164 plays a crucial role in the working fluid circuit for brake assistance. It is responsible for:

• maintaining the correct fluid level in the servo system,
• compensating for fluid volume changes during system operation,
• stable supply to the brake booster and servo,
• reducing the risk of air ingress into the brake circuit.

Thanks to its proper design, the reservoir ensures uniform pressure in the assistance system, which translates to consistent brake response and predictable vehicle behavior during intensive braking.

Benefits of Using an Original Mercedes Reservoir

Using an original reservoir in the Mercedes W164 allows for the preservation of the factory operating parameters of the brake booster and proportioning valve. The most significant advantages include:

• Full compatibility with the braking system – perfect fit for the factory-installed hoses, mounts, and brake booster used in the W164.
• Replication of the factory brake pedal feel – no undesirable changes in assistance force.
• Seamless integration with other components from the Brake Boosters and Proportioning Valves group for the specific model.
• Reduced risk of leaks due to a design that meets the vehicle manufacturer's requirements.

By choosing a used OEM part, you get a technically matched component that allows you to restore proper braking system function without the need for installation modifications.

Component Condition and Installation Aspects

The offered brake servo fluid reservoir is a dismantled component, allowing for economical repairs while maintaining original manufacturer specifications. This type of part is particularly useful for:

• replacing a damaged or leaking reservoir,
• repairs after a servo system failure,
• restoring the completeness of the braking system in a Mercedes W164.

The reservoir's design is prepared for installation at factory mounting points, which simplifies the mechanic's work and reduces service time. Maintaining the original connection geometry minimizes stress on hoses and connectors, which is important for long-term system sealing.

Application in Brake Servo System Service and Diagnostics

When working on the brake assist system in a Mercedes W164, the reservoir is one of the components worth checking for wear, micro-cracks, and potential leaks. Replacing it with a functional OEM component allows for:

• stabilizing the fluid level in the system,
• reducing the risk of braking effectiveness loss under heavy load,
• facilitating bleeding and further diagnostics of the brake booster and proportioning valve.

This is a practical solution for both standard maintenance and more advanced brake system repairs in Mercedes vehicles.

If you are planning a comprehensive repair or upgrade of the braking area in your Mercedes and need other parts from the same group, such as a brake booster, proportioning valve, or related hoses, check the available parts in the Mercedes Brake Boosters and Proportioning Valves category.

Additional Service and Maintenance Tips

When replacing the brake servo fluid reservoir, it is worth paying attention to the quality of the fluid used, the bleeding procedure, and the overall condition of hoses and connections. Properly performed installation and system service not only affect braking effectiveness but also driving comfort and vehicle stability during sudden maneuvers.

For users who are simultaneously servicing other vehicle systems, practical tips on selecting used OEM components and maintenance schedules may be useful. Detailed information can be found in the article Air Conditioning and Heating – Part Selection and Maintenance for Year-Round Comfort, which discusses the approach to choosing original components and planning vehicle service work.