Final answer:
Disc brake units come with a self-adjusting mechanism to ensure consistent braking performance as the pads wear, thus making the statement true.
Step-by-step explanation:
The statement that disc brake units are automatically adjusting units is true. Disc brakes are designed with a self-adjusting mechanism that compensates for pad wear. Each time the brakes are applied, the caliper applies pressure to the pads, which in turn press against the rotor. As the pads wear down over time, the caliper piston extends further to maintain the correct distance between the pad and the rotor. This self-adjustment ensures the brakes remain effective and do not require manual adjustment as often as older drum brake systems.