Mercedes ML W164 Brake Servo Fluid Reservoir Expansion Tank Bottle A1644300202

The Mercedes ML W164 Brake Fluid Reservoir for Brake Booster is an original component of the Mercedes braking system, designed to work with the brake booster in ML W164 series models. A used reservoir from this group ensures proper brake fluid storage and stable supply to the pump and booster, which translates to predictable operation of the entire system.

Specifications and technical data

• SKU: A1644300202
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1644300202
• Substitutable numbers: A1644300202, A 164 430 02 02
• Category: Reservoirs & Caps

Purpose and Function in the Braking System

The brake fluid reservoir that works with the brake booster in the Mercedes ML W164 is responsible for maintaining the correct fluid level and compensating for its volume changes during system operation. A correctly selected component from this group reduces the risk of air entering the circuits, supports uniform operation of the caliper pistons, and stabilizes working pressure during intensive braking.

Thanks to its factory fit for the brake booster in the ML W164, the reservoir maintains the correct geometry of its spigots and mounting points, which facilitates installation and allows for the preservation of original hose routing. This solution is particularly important when servicing vehicles equipped with advanced brake assist systems.

Benefits of Using an Original Reservoir

Using an original brake fluid reservoir in the braking system offers a number of practical benefits:

• maintaining the factory operating characteristics of the brake booster and pump,
• secure fit to mounting points and hoses in the engine bay,
• appropriate material resistance to brake fluid,
• compatibility with factory level sensors (if present in the specific vehicle configuration).

For the user, this means more predictable brake pedal behavior, easier fluid level monitoring, and reduced potential leaks resulting from imprecise fitment of aftermarket alternatives. For SUV-class vehicles like the ML W164, this is important both in daily use and under heavier loads.

Characteristics of a Used Component

The presented reservoir is a used part obtained from disassembly and is offered as a used part, providing a reasonable compromise between cost and maintaining the original manufacturer's specifications. This type of component is particularly attractive for comprehensive brake system repairs when multiple parts need to be replaced simultaneously, and compliance with the factory design remains a priority.

When choosing a used brake fluid reservoir for a Mercedes, it is worth paying attention to the condition of the spigots, mounting sockets, and housing to ensure tightness and correct seating on the brake booster. A properly selected component allows for the restoration of full system functionality without altering the manufacturer's original design.

Fitment and Installation Aspects

Due to its specific connection with the brake booster in the ML W164, the reservoir should be selected strictly for this model, taking into account the mounting design and spigot arrangement. Installation involves correctly seating the reservoir on the brake booster, connecting the hoses, and bleeding the system according to the service procedure for the specific vehicle.

For workshops and users performing self-service, it is important to perform a leak check and a road test after replacing the reservoir, verifying the stability of the pedal travel and the absence of brake system warning messages.

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 additional reservoirs, caps, or related accessories, check the available parts in the Mercedes Brake Fluid Reservoirs and Caps category.

Safe Selection of Used Brake System Components

When choosing a used brake fluid reservoir for a Mercedes ML W164, it is advisable to be guided not only by model compatibility but also by general principles for selecting used brake system components. These include visual inspection, leak testing, condition of connections, and fitment to the specific vehicle configuration.

To streamline the verification process and minimize the risk of incorrect selection, a practical guide describing step-by-step how to assess used brake system components can be helpful. A detailed checklist can be found in the article "Second-Hand Braking System: How to Safely Select Discs, Calipers, and ABS?", which will help you better plan your service and consciously select components for your car.