Genuine OEM Mercedes-Benz Caliper Guide Pin, part number A0004217500. This guide pin is a critical component of the front brake system, responsible for guiding the brake caliper as it applies pressure to the brake rotor. It ensures the caliper moves freely and evenly. The pin is made from hardened steel for strength and wear resistance. Genuine OEM parts are manufactured to exact specifications for proper caliper alignment and smooth operation, ensuring optimal braking performance and safety.