Method for autonomously braking a motor vehicle and autonomous braking system for a motor vehicle

The invention relates to a method for autonomously braking a motor vehicle (1) by means of an autonomous braking system (2) of the vehicle (1), comprising the step of detecting an obstacle (5) present in a surrounding area (6) of the vehicle (1) by means of a sensor device (7) of the vehicle (1), and the step of autonomously braking the vehicle (1) by means of the autonomous braking system (2) upon a braking criterion in respect of a distance (9) between the obstacle (5) and the vehicle (1) being fulfilled, wherein at least one braking parameter is set for the autonomous braking. A road surface parameter (µ) describing a road surface condition is determined and considered by the autonomous braking system (2) for the autonomous braking. The invention also relates to an autonomous braking system (2) for autonomously braking a vehicle (1).