Mercedes-Benz S-Class 2020 Operator's Manual page 209

The distance warning function can aid you in the following situations with an intermittent warning tone and a warning lamp:
Vehicles traveling in
front
Vehicles without Driv‐ Up to approx. 155 mph
ing Assistance Pack‐ (250 km/h)
age
Vehicles with Driving Up to approx. 155 mph
Assistance Package (250 km/h)
The autonomous braking function may intervene at speeds starting from approximately 4 mph (7 km/h) in the following situations:
Vehicles traveling in
front
Vehicles without Driv‐ Up to approx. 124 mph
ing Assistance Pack‐ (200 km/h)
age
Vehicles with Driving Up to approx. 155 mph
Assistance Package (250 km/h)
Stationary vehicles Crossing vehicles
Up to approx. 50 mph No reaction
(80 km/h)
Up to approx. 62 mph Up to approx. 43 mph
(100 km/h) (70 km/h)
Stationary vehicles Crossing vehicles
Up to approx. 31 mph No reaction
(50 km/h)
Up to approx. 62 mph Up to approx. 43 mph
(100 km/h) (70 km/h)
Driving and parking 207
Moving pedestrians Stationary pedes‐
trians
Up to approx. 37 mph No reaction
(60 km/h)
Up to approx. 50 mph Up to approx. 43 mph
(80 km/h) (70 km/h)
Moving pedestrians Stationary pedes‐
trians
Up to approx. 37 mph No reaction
(60 km/h)
Up to approx. 43 mph Up to approx. 43 mph
(70 km/h) (70 km/h)