Mercedes W211 CLS C219 Brake Servo Master Cylinder Booster Unit A2114300630

Mercedes W211 CLS C219 Brake Servo Master Cylinder Booster Unit is an original braking system component from the Brake Servos and Proportioning Valves group, designed for Mercedes E-Class W211 and CLS C219 models. This used OEM part ensures factory-standard brake assistance, resulting in predictable pedal feel and safe deceleration. It is an ideal solution for users who require compatibility with the factory installation and wish to maintain consistent performance parameters across the entire system.

Specifications and technical data

• SKU: A2114300630
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2114300630
• Substitutable numbers: A2114300630, A 211 430 06 30, A2114300802, A 211 430 08 02
• Category: Brake Servos

Purpose and function in the braking system

The brake servo in the Mercedes W211 and CLS C219 is responsible for increasing the force applied to the brake master cylinder piston using vacuum from the engine or the vacuum system. This provides the driver with a significantly lighter pedal stroke while maintaining high braking efficiency. This component works in conjunction with the factory ABS/ESP system, preserving the original operating characteristics of the vehicle's stability control systems.

Advantages of using an original Mercedes servo

Using an original servo to replace a worn or damaged component helps restore predictable brake pedal response and stable pressure in the brake circuits. In practice, this means:

• more linear response to pedal pressure,
• easier modulation of braking force in emergency situations,
• proper cooperation with factory brake proportioning valves,
• maintenance of factory safety system operating parameters.

For users who prioritize consistency with the factory Mercedes configuration, choosing an original servo is a technically safe and predictable solution for vehicle maintenance.

Compatibility and part selection

The brake servo from this listing comes from the Mercedes product line and is assigned to specific variants of the W211 and CLS C219 models. When selecting this component, it is crucial to compare part markings and interchangeable numbers in the vehicle's service documentation or the manufacturer's catalog. This allows you to verify whether a specific servo configuration will be compatible with the brake master cylinder, lines, and ABS module installed in your vehicle.

If you have any doubts regarding fitment, it is recommended to consult a mechanic or a Mercedes braking system specialist who can verify compatibility based on your vehicle's data. This approach minimizes the risk of installing an incorrect component and eliminates issues with subsequent system adjustment.

Condition, installation, and operation

The offered item comes from the category of used Mercedes parts, allowing for economical repair while maintaining the original design. Before installation, a standard workshop procedure is recommended: checking for leaks, inspecting mounting points, and assessing compatibility with the existing brake master cylinder. A correctly selected and installed servo allows for the restoration of full braking system functionality without the need for modifications to the electrical or hydraulic systems beyond standard bleeding.

During operation, it is worth periodically checking the brake pedal response and any unusual noises from the engine bulkhead area, which allows for early detection of symptoms such as diaphragm leaks or vacuum problems. This approach increases safety and reduces the risk of sudden loss of brake assistance.

Braking system expansion and additional resources

If you are planning a comprehensive repair or upgrade of the braking area in your Mercedes and need other elements from the same group, such as servos, proportioning valves, or related assistance components, check out the available parts in the Mercedes Brake Servos and Proportioning Valves category.

During service work, it is common to combine braking system maintenance with the inspection of other systems that affect driving comfort and safety. It is worth familiarizing yourself with practical tips regarding the selection of used OEM components and service schedules, described in the article Air conditioning and heating – part selection and maintenance for year-round comfort, which organizes the approach to operating key vehicle systems.