Mercedes W211 W219 Brake Servo Brake Master Cylinder Booster Unit A2114301030

The Brake Booster with Brake Master Cylinder for Mercedes W211 / W219 is an original brake system component designed for E-Class and CLS models. As part of the brake boosters and proportioning valves group, it ensures stable brake assistance and precise pressure regulation within the system. A used OEM component is a sensible choice for drivers seeking a proven solution at an attractive price.

Specifications and technical data

• SKU: rhd-A2114301030
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2114301030
• Substitutable numbers: A2114301030, A 211 430 10 30, A0054308130, A 005 430 81 30, A0064301801, A 006 430 18 01, A2114301202, A 211 430 12 02, BG
• Category: Brake Servos

Purpose and Function in the Braking System

The integrated brake booster and master cylinder is responsible for amplifying the force applied to the brake pedal and transmitting it to the hydraulic circuits. In practice, this translates to a shorter braking distance with less effort from the driver and stable system pressure during intensive braking.

This component works in conjunction with other braking system sub-assemblies, such as calipers, lines, and proportioning valves, to create a cohesive and safe system. A correctly selected booster with a master cylinder is crucial for maintaining the factory braking characteristics in Mercedes E-Class (W211) and CLS (W219) models.

Advantages of Using an Original Mercedes Brake Booster

Choosing an original part from the Mercedes group ensures:

• factory fit for mounting points and brake system geometry,
• compatibility with safety system operating parameters,
• stable brake assistance under typical operating conditions,
• cohesion with other system elements, without the need for modifications.

As a part from the brake boosters and proportioning valves category, this product is designed to operate in demanding conditions, taking into account the loads typical for heavier, premium-class models.

Condition, Verification, and Preparation for Installation

The offered component is used, which helps reduce repair costs while maintaining performance characteristics close to factory standards. Each part in this group is routinely verified for leaks, proper operation of the assistance mechanism, and the condition of hydraulic and vacuum connections. This ensures the user receives a component ready for further operation after proper installation.

To maximize the potential of a used booster with a master cylinder, it is advisable to follow basic maintenance procedures and ensure regular servicing of the braking system. Practical tips can be found in the article: How to Extend the Lifespan of Used Car Parts in Your Vehicle.

Benefits of Installation in Mercedes W211 / W219

Installing this brake booster with a master cylinder in the Mercedes E-Class or CLS allows for the restoration of proper brake pedal function, reduction of braking effectiveness loss risk, and maintenance of predictable vehicle behavior during emergency deceleration. This is particularly important in heavier vehicles and at higher highway speeds.

For users planning a more extensive upgrade or refresh of their braking and suspension systems, using a proven, used OEM part offers a sensible compromise between cost and functionality. Combined with regular brake fluid changes and inspection of lines and calipers, it helps maintain a stable level of everyday safety.

Summary

The Brake Booster with Brake Master Cylinder for Mercedes W211 / W219 is a technically matched, original brake system component designed for discerning users who value factory solutions. A used OEM component, after proper verification and correct installation, provides an effective way to restore proper braking characteristics to your Mercedes without the need to invest in new parts.