Mercedes W176 W246 Rear Left N/S Brake Caliper Motor Actuator Unit A1729060200

Mercedes W176 W246 Rear Left N/S Brake Caliper Motor Actuator Unit is an original brake system component designed to work with the electric parking brake in Mercedes vehicles. This specialized caliper actuator, mounted on the rear left axle, ensures stable operation of the parking brake and precise holding of the vehicle in a stationary position. Thanks to its factory design, it provides a consistent addition to the standard brake system without the need for any installation modifications.

Specifications and technical data

• SKU: A1729060200
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1729060200
• Substitutable numbers: A1729060200, A 172 906 02 00
• Location on the vehicle: Rear, Left
• Category: Calipers & Brackets

Purpose and function in the brake system

The parking brake caliper motor is responsible for the automatic engagement and release of the parking brake on the rear left axle. It works with the vehicle's control module, responding to signals from the parking brake button and driver assistance systems, such as hill-start assist. The Rear, Left placement allows for clear identification of the mounting side and reduces the risk of errors when selecting parts.

This element is particularly important in vehicles equipped with an electric parking brake, where the proper operation of the caliper actuator affects parking safety, vehicle stability on inclines, and the correct functioning of the automatic brake engagement feature.

Benefits of using an original caliper motor

Choosing an original parking brake caliper motor for your Mercedes translates into:

• maintaining the factory operating parameters of the electric parking brake,
• proper cooperation with the vehicle's electronics and safety systems,
• accurate mechanical fit to the caliper and mounts on the rear axle,
• reduced risk of diagnostic errors associated with incompatible aftermarket replacements.

As an element from the Brake calipers and brackets group, this motor is designed to withstand the loads resulting from frequent engagement and release of the brake, which is significant during intensive city and highway driving.

Mounting and operational characteristics

The motor is designed for installation on the rear left side of the vehicle, in the location provided by the manufacturer. Thanks to a design consistent with the original Mercedes standard, the installation is straightforward, without the need to adapt mounts or the electrical harness. A correctly selected component facilitates:

• maintaining alignment and proper positioning relative to the caliper,
• trouble-free connection to the electrical system,
• maintaining tightness and protection against road debris.

This solution is particularly beneficial when servicing vehicles that display parking brake error messages, uneven brake engagement, or problems with releasing the brake after parking.

Professional selection and repair cost optimization

When selecting a parking brake caliper motor for a Mercedes, it is crucial to verify compatibility with the specific body version and brake system. The product has a dedicated OEM part number and interchangeable numbers, which facilitates precise matching based on manufacturer catalogs and service documentation. Combined with proper diagnostics, this allows for reducing the number of unnecessary replacements and shortening the vehicle's downtime in the workshop.

To better understand how to safely use original recycled parts and simultaneously reduce service costs, it is worth reading our specialized guide: Brake calipers under the microscope: How to effectively reduce brake system repair costs by choosing verified recycled parts. The article explains what to look for when choosing used brake system components and how to assess their suitability for further use.

Expanding your Mercedes brake system service

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

This allows you to select a consistent set of components in one service stage, optimize workshop labor time, and ensure even wear of components throughout the entire brake system.