Mercedes-Benz A-Class 2020 Operator's Manual page 167

The distance warning function can aid you in the following situations with an intermittent warning tone and a warning lamp:
Vehicles Stationary
traveling in vehicles
front
Vehicles Up to approx. Up to approx.
without Driv‐ 155 mph 50 mph
ing Assis‐ (250 km/h) (80 km/h)
tance Pack‐
age
Vehicles with Up to approx. Up to approx.
Driving Assis‐ 155 mph 62 mph
tance Pack‐ (250 km/h) (100 km/h)
age
Crossing Moving Stationary
vehicles pedestrians pedestrians
No reaction Up to approx. No reaction
50 mph
(80 km/h)
Up to approx. Up to approx. Up to approx.
43 mph 50 mph 43 mph
(70 km/h) (80 km/h) (70 km/h)
Driving and parking 165
Crossing Cyclists travel‐
cyclists ing in front
Up to approx. Up to approx.
37 mph 50 mph
(60 km/h) (80 km/h)
Up to approx. Up to approx.
43 mph 50 mph
(70 km/h) (80 km/h)
Stationary
cyclists
No reaction
Up to approx.
43 mph
(70 km/h)