Mercedes-Benz A-Class Operator's Manual page 177

Obstacles above the detection range, e.g.
R
overhanging loads, overhangs or loading
ramps of trucks.
The sensors must be free of dirt, ice and slush.
Otherwise, they may not function correctly.
Clean the sensors regularly, taking care not to
scratch or damage them.
Function of the passive side impact protec‐
tion
Passive side impact protection is an additional
Parking Assist PARKTRONIC function which
warns the driver about obstacles at the side of
the vehicle. A warning is issued when obstacles
are detected between the front and rear detec‐
tion range. In order for an object to be detected,
the sensors in the front and rear bumper must
detect the object while you are driving past it.
During the parking procedure or maneuvering,
objects are detected as the vehicle drives past.
If you steer in the direction of a detected obsta‐
cle and there is a risk of a lateral collision, a
warning is issued. The lateral segments light up
orange or red, depending on the distance to the
obstacle.
Segment color depending on distance
Color Lateral distance in
cm
Orange Approx. 30 - 60
Red Approx. < 30
In order for lateral front or rear segments to be
displayed, the vehicle must first travel a distance
of at least half of the vehicle length. Once the
vehicle has traveled the length of the vehicle, all
of the lateral front and rear segments can be dis‐
played.
Driving and parking 175
Vehicles without 360° Camera
1 Parking Assist PARKTRONIC is only opera‐
tional at the front and rear
2 Parking Assist PARKTRONIC is operational
and can also warn the driver about obstacles
at the side of the vehicle
3 Obstacle detected at the front right (orange)
and rear (red)