The air flow that comes during movement constantly cools the disc brake mechanism. Additional cooling of the front disc brake mechanisms is provided for models with a 6-cylinder engine; there are large recesses on the brake mechanism disc that capture air, thereby improving cooling.
Design of the front disc brakes of the Audi 100 and (where are they installed) the rear wheels have a so-called floating bracket. The brake caliper looks like a clenched fist. The brake cylinder with a piston presses the inner pad against the brake disc, causing the cylinder body to move along the guide and press the brake pad against the brake disc on the other side.
Disc brakes in wet weather
In constant rain, the exposed brake discs become heavily wetted, and as a result, the braking effect occurs a fraction of a second later. The moisture between the brake discs and the brake pads must first evaporate. In winter, when salt is actively used, this effect is even stronger, because the salt that gets on the brake pads and discs must first be wiped off during braking.
[The full version is posted on the resource: AudiManual]