1. If one or both rear wheels lock up several times under heavy braking, first check that this is not caused by adverse road conditions or incorrect tire pressure/heavy tread wear. Then check the condition of all four brake units. Only then can it be assumed that the pressure control valve in the brake system is defective or incorrectly adjusted.
2. At the time of writing this manual, there is no information that allows the owner of the car to adjust this component on his own; if necessary, contact a Skoda dealer who has the necessary equipment. Do not over-adjust the valve operating lever (see photo).