The Auto Hold function is an extension of the electric parking brake and offers you more convenience and extra safety. Operated via the ABS/ESC hydraulic unit, it stops your car from rolling away accidentally when standing still or setting off. When you brake your car to a standstill position, Auto Hold retains the last-applied braking pressure. You can take your foot off the brake, and all four-wheel brakes will stay on. If the ABS wheel speed sensors detect any rolling, braking force is automatically increased until the car comes to a standstill again. As soon as you press the accelerator and, in the case of manual gearboxes, release the clutch, Auto Hold reduces the braking pressure.