Mercedes W176 W246 Rear Right O/S Brake Caliper Motor Actuator Unit A1729060300

Mercedes W176 W246 Rear Right O/S Brake Caliper Motor Actuator Unit is an original component from the Brake calipers and brackets group, designed for operation in the rear right section of the braking system. It enables reliable control of the parking brake, ensuring stable immobilization of the vehicle and proper integration with the car's electronics. This solution is dedicated to users looking for a proven component for professional brake system repair in a Mercedes.

Specifications and technical data

• SKU: A1729060300
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1729060300
• Substitutable numbers: A1729060300, A 172 906 03 00
• Location on the vehicle: Rear, Right
• Category: Calipers & Brackets

Purpose and function in the braking system

The presented motor is the drive element of the parking brake caliper, responsible for generating the clamping force of the pads against the disc when the parking brake is activated. It is mounted in the rear right part of the vehicle, allowing it to work in conjunction with other components of the rear axle braking system. As a part dedicated to Mercedes, it ensures proper geometric fit and correct communication with the factory control system.

Design and advantages of using an original component

The parking brake caliper motor has been designed to operate in a demanding environment – near the wheel, where variable temperatures, moisture, and road debris occur. The original design ensures:

• stable torque transmission to the caliper mechanism,
• proper cooperation with the vehicle's electronics,
• adequate housing sealing against external factors,
• compatibility with the factory mounting and electrical harness.

Using an original motor to replace a worn or damaged component allows for the restoration of full parking brake functionality without the need for system modifications.

Benefits of installation in Mercedes W176 / W246

In Mercedes W176 and W246 class vehicles, the parking brake is an essential safety feature, especially in daily city driving and when parking on inclines. Replacing the caliper motor with a functional component allows you to:

• reduce the risk of parking brake system errors on the dashboard,
• ensure even brake operation on both sides of the rear axle,
• maintain proper operation of the automatic brake engagement and release function (if present in the vehicle configuration),
• limit mechanical wear of the caliper resulting from incomplete extension or retraction of the mechanism.

Thanks to the fitment for the specific Mercedes model, the installation process is straightforward, and the component works seamlessly with the existing brake system configuration after proper installation.

Characteristics of the used component

The offered motor comes from the used original parts segment, which allows combining cost-effective repair with the preservation of factory specifications. This type of solution is often chosen in professional workshops when the priority is compliance with factory equipment and the possibility of trouble-free installation. Before installation, it is recommended to perform a standard check of the condition of connectors, mounting sockets, and the mechanical range of motion to ensure proper operation in the specific vehicle.

Selection and safety when purchasing used brake components

When selecting a parking brake caliper motor, it is crucial to match it to the model, body version, and brake system configuration. It is worth paying attention to compliance with manufacturer markings, caliper type, and vehicle placement. For users who want to deepen their knowledge on the safe selection of used brake components, the following guide will be useful: how to safely select used brake system components.

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 calipers, brackets, or mounting elements, check the available parts in the Mercedes Brake calipers and brackets category.