Upper speed limit
If the vehicle speed exceeds approx.
155 mph/250 km/h, the system is deactivated
If the vehicle speed falls below approx.
155 mph/250 km/h, the system once again re‐
sponds according to the setting.
The system may not be fully functional in the fol‐
▷ When a vehicle is approaching at a speed
much faster than your own.
▷ In heavy fog, wet conditions, or snowfall.
▷ In tight curves or on narrow lanes.
▷ If the bumper is dirty, iced up, or covered,
for instance by stickers.
▷ After improperly performed work on the vehi‐
▷ If cargo protrudes.
Attaching any objects such as stickers or film in
the beam area of the radar sensors will also im‐
pact the function of the radar sensors and may
even cause them to fail.
For vehicles with side collision mitigation, the
steering intervention can be limited, for instance
in the following situation:
▷ In the event of missing, worn, poorly visible,
merging, diverging, or multiple lane markings
such as in construction areas.
▷ When lane markings are covered in snow, ice,
dirt or water.
▷ When lane markings are not white.
▷ When lane markings are covered by objects.
▷ When driving very close to the vehicle in front
▷ If there are constant blinding effects because
of oncoming light, for instance from the sun
low in the sky.
▷ If the field of view of the camera or the wind‐
shield is dirty or covered in the area of the in‐
▷ If the camera has overheated and been tem‐
porarily switched off due to excessively high
▷ Up to 10 seconds after the start of the engine
via the Start/Stop button.
▷ During calibration of the camera immediately
after vehicle delivery.
A Check Control message is displayed when the
system is not fully functional.
If the trailer power socket is in use or trailer tow‐
ing is activated, for instance during operation
with trailer or bicycle rack, the system cannot be
switched on. A Check Control message is dis‐
Depending on the selected warning settings,
e.g., warning time, more or fewer warnings can
be displayed. However, there may also be an ex‐
cess of premature warnings of critical situations.
Side collision mitigation
The system helps to avoid imminent side colli‐
Four radar sensors in the bumpers monitor the
area next to the vehicle in the speed range from
Online Edition for Part no. 01405A10E93 - VI/20