Brake Caliper Mercedes W176 W246 Front Right Wheel O/S Brake Unit 320x30

Brake Caliper Mercedes W176 W246 Front Right Wheel O/S Brake Unit 320x30 is an original brake system component from the Brake calipers and brackets group, designed for installation on the right side of the front axle. This used, factory-spec caliper ensures proper pad guidance relative to the large-diameter brake disc, which translates into stable, predictable braking. This is a solution for users seeking OEM parts with maintained geometry who want to preserve the factory performance parameters of the system.

Specifications and technical data

• SKU: A0004217081
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0004217081
• Substitutable numbers: A0004217081, A 000 421 70 81
• Location on the vehicle: Front, Right
• Category: Calipers & Brackets

Purpose and vehicle placement

The presented brake caliper is intended for installation on the front, right side of Mercedes W176 and W246 series vehicles. The design is adapted to work with a disc of increased diameter and thickness, which allows for effective heat dissipation and stable operation during intensive braking.

Placement on the front axle means that the component operates in the most heavily loaded part of the brake system, which is why it is crucial to use an original caliper with appropriate body rigidity, correct piston guidance, and proper clamping force distribution.

Construction and operating parameters of the caliper

The caliper has been designed as a precise mechanism for guiding brake pads relative to a disc with an increased working diameter. The body provides adequate rigidity, limiting deflection under high system pressures, which translates into even pad wear and repeatable braking force.

The design includes space for guide and sealing elements, which are responsible for the smooth retraction of the pistons after releasing the brake pedal. Thanks to this, the system maintains a stable brake "bite" point, and the pedal travel remains predictable. Using an original caliper allows for the preservation of the factory operating characteristics of the system, which is particularly important in vehicles with higher weight and power.

Benefits of using an original, used caliper

Choosing an original Mercedes brake caliper from the secondary market is a solution that allows you to combine cost control with compliance with factory specifications. Compared to aftermarket replacements of uncertain origin, the OEM component provides:

• proper fitment to the steering knuckle and brake disc,
• compatibility with the factory brake line system,
• maintenance of factory braking force characteristics on the front axle,
• lower risk of problems with installation and subsequent operation.

For users who want to consciously manage their service budget, using a used OEM component is often more cost-effective than purchasing a cheaper, but unverified replacement. Stable brake system operation has a direct impact on safety, which is why selecting the right caliper is crucial during any major intervention in the system.

Selection, installation, and service aspects

Before installation, it is recommended to verify the compatibility of the caliper with the specific vehicle version, including the disc type and brake system configuration. In workshop practice, when replacing a caliper, it is worth checking the following at the same time:

• the condition of the brake discs and pads working with the caliper,
• the tightness of the brake lines and the condition of the bleeders,
• guides, mounting elements, and attachment points to the steering knuckle.

Professional installation with proper system bleeding allows you to fully utilize the potential of the part and reduce the risk of uneven braking or vehicle pulling during braking. In case of doubts regarding selection or the installation procedure, it is worth using the experience of a specialized service center.

Expert support and related system components

To better understand how to safely use the secondary market when repairing the brake system and how to assess the condition of components such as calipers, it is worth reading our guide: Brake calipers under the microscope: How to effectively reduce brake system repair costs by choosing verified recycled parts. The article discusses practical assessment criteria, common installation errors, and ways to optimize service costs without compromising safety.

If you are planning a comprehensive repair or upgrade of the braking zone in your Mercedes and need other components from the same group, such as additional calipers, mounting brackets, or supports, check the available parts in the Mercedes brake calipers and brackets category.