Genuine OEM Mercedes-Benz Front Brake Caliper Bleed Valve, part number A0004213865. This valve is essential for releasing trapped air from the front brake caliper, ensuring optimal braking performance and preventing spongy brake pedal feel. It is a small but critical component of the hydraulic brake system. The part weighs 0.013 kg. Genuine OEM bleed valves are manufactured with precise threading and sealing to prevent leaks and ensure reliable operation of the braking system.