Description
Mercedes W164 W251 Rear Brake Disc Adjuster Parking Brake Unit is an original brake system component designed for precise adjustment of the shoe mechanism within the brake disc drum. Thanks to the factory design by Mercedes, it ensures stable parking brake operation as well as proper sealing and guidance of the working elements, which translates into safe vehicle operation.
Specifications and technical data
- SKU: A1644200082
- Mark: Mercedes (Genuine OE)
- Condition: Used
- OEM Part Number: A1644200082
- Substitutable numbers: A1644200082, A 164 420 00 82
- Location on the vehicle: Rear
- Category: Brake Pad & Shoe Hardware
Purpose and function in the brake system
The described component belongs to the Mounting parts for brake pads and shoes group and is responsible for the mechanical adjustment of the parking brake shoe expansion on the rear axle. A correctly selected adjuster allows for:
- maintaining the proper operating clearance between the lining and the working surface of the drum inside the disc,
- even operation of both shoes when the parking brake is applied,
- stable holding of the vehicle while parked, even when loaded.
In combination with correctly selected parking brake shoes and cables, this component supports repeatable, predictable operation of the entire system, which is important for both safety and vehicle handling comfort.
Compatibility with Mercedes W164 and W251
The adjuster has been designed specifically for Mercedes SUV and VAN platforms, such as the W164 and W251, for installation on the vehicle’s rear axle. This means that the geometry, adjustment range, and mounting method are adapted to the factory discs and shoes used in these models.
To ensure the selection of the correct part, it is worth verifying compatibility using the vehicle identification number and the part number. The following detailed guide will be helpful: how to choose the right car part by VIN and OEM number step by step, which describes practical verification methods and a list of questions for the seller.
Characteristics of the original Mercedes part
As a Mercedes brand product, the parking brake adjuster has been designed to maintain the factory operating parameters of the system. This includes, among others:
- appropriately selected length and adjustment travel,
- precise fit with brake levers and shoes,
- compatibility with original mounting elements on the rear axle.
Thanks to this, the installation process is predictable, without the need for modifications or fitting aftermarket replacements. In practice, this translates into easier parking brake adjustment and a lower risk of uneven shoe wear.
Condition, application, and good installation practices
The offered item is a used part, sourced from dismantling, which allows for an economical repair of the brake system while maintaining the manufacturer’s original specifications. Before installation, it is recommended to perform a standard visual inspection, clean the working surfaces, and check the free movement of the adjustment mechanism.
To maximize the potential of used parts, it is worth following the principles of proper operation and periodic maintenance of the brake system. Practical tips can be found in the article: how to extend the service life of used car parts in daily operation, which describes, among other things, recommendations for the maintenance of mechanical components.
Why choose this parking brake adjuster?
Choosing an original rear parking brake adjuster for Mercedes W164 and W251 is a solution that allows you to maintain the factory operating parameters of the brake system, avoid adjustment problems, and reduce the risk of uneven shoe operation. This is particularly important in heavier vehicles, where a functional parking brake has a direct impact on the safety of parking on inclines and under full load.
If you are planning comprehensive maintenance of the rear brake system in your Mercedes and want to maintain the consistency of the solutions used, this component will be the right choice as a mounting part working with the disc and parking brake shoes.
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