Mercedes W212 Brake Servo Booster Master Cylinder Unit A2124301430

Mercedes W212 Brake Servo Booster Master Cylinder Unit is a complete, original unit designed for the braking system of the Mercedes E-Class W212 generation. This component is responsible for stable reinforcement of the brake pedal pressure, ensuring predictable vehicle response and comfortable, reliable operation of the entire braking system.

Specifications and technical data

• SKU: A2124301430
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2124301430
• Substitutable numbers: A2124301430, A 212 430 14 30, KD
• Category: Brake Servos

Purpose and function in the braking system

The described servo unit with brake force regulator and master cylinder has been designed specifically for Mercedes E-Class W212 vehicles. This assembly is responsible for using vacuum to increase the force exerted by the driver on the brake pedal, while the integrated master cylinder distributes pressure in the brake circuits, which translates into predictable, even braking of the front and rear axles.

Such a design solution allows for maintaining the consistency of the braking system's performance parameters with the manufacturer's factory specifications, which is important both during standard operation and during more intensive highway driving.

Construction of the servo and brake force regulator assembly

The unit belongs to the Brake servos and regulators category, which means it combines several key components responsible for generating and metering pressure in the system. Using an original Mercedes solution allows for maintaining the correct force ratio, pedal operating characteristics, and compatibility with the vehicle's factory safety systems.

In practice, this translates into:

• consistent operation with the vehicle's ABS/ESP system,
• repeatable brake pedal travel characteristics,
• stable maintenance of pressure in the brake circuits.

Condition, origin, and benefits of using a used part

The offered item is a used part, sourced from the dismantling of a Mercedes vehicle. Choosing an original, used component of this class allows for maintaining factory fitment to the braking system while reducing costs compared to new replacements of unknown origin.

In the case of components such as the servo and brake force regulator, it is particularly important to maintain compliance with the manufacturer's factory specifications, which affects safety, braking stability, and the predictability of the vehicle's behavior in emergency situations.

Selection and compatibility verification

To correctly select this unit for the specific engine version and equipment level of your car, it is worth verifying the part markings based on the VIN number and the manufacturer's catalog data. The product has an assigned OEM part number and corresponding interchangeable numbers, which facilitates unambiguous identification and minimizes the risk of selecting an incorrect component.

In case of doubt, consultation with a mechanic or a specialist dealing with Mercedes braking systems is recommended, who will confirm compatibility with the specific vehicle configuration.

Expansion of braking 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 servos, brake force regulators, or complete booster assemblies, check the available parts in the Mercedes brake servos and regulators category.

To better take care of the durability of the installed component and other dismantled parts, it is worth familiarizing yourself with practical tips regarding operation and maintenance – you will find them in the article How to extend the life of used car parts?, which describes, among other things, the principles of using and servicing mechanical and hydraulic components in vehicles.