observe the information on running-in the
vehicle.
R
the radio sensors are dirty or covered
(Y page 166)
R
in heavy rain or snow
R
there is interference from other radar
sources, e.g. in multi-storey car parks
R
the vehicle travelling in front is narrow,
e.g. a motorcycle
R
the vehicle travelling in front is travelling
on a different line
Autonomous braking can be cancelled by
briefly depressing the accelerator pedal.
If the brake lamps are inoperative, deacti-
vate Active Brake Assist.
i
Observe the notes on "Limitations of the
driving safety systems" (Y page 56).
Distance warning and forward collision
warning with autonomous braking func-
tion
Method of operation
If the distance maintained to the vehicle
ahead is insufficient for the speed you are
driving at, the · warning lamp lights up.
If Active Brake Assist detects a risk of colli-
sion while driving, the · warning lamp
lights up and a warning tone sounds. If the
driver depresses the brake pedal fast, the
braking pressure may be increased to a full
brake application.
The autonomous braking function may inter-
vene if the driver does not react to the
forward collision warning.
When driving at speeds of more than 30 km/h,
the forward collision warning may issue a
warning in the following situations:
Situation Speed you are trav-
elling
Vehicles travelling
ahead
30 - 140 km/h
Vehicles coming to a
standstill
30 - 140 km/h
Stationary vehicles 30 - 80 km/h
Other objects or
crossing vehicles
No warning possible
When driving at speeds of more than 30 km/h,
the autonomous braking function may inter-
vene in the following situations:
Situation Speed you are trav-
elling
Vehicles travelling
ahead
30 - 140 km/h
Vehicles coming to a
standstill
30 - 140 km/h
Stationary vehicles No intervention
possible
Other objects or
crossing vehicles
No intervention
possible
Activating or deactivating Active Brake
Assist
Active Brake Assist is automatically activa-
ted when you start the engine.
Monochrome display: activating/deactivat-
ing Active Brake Assist using the on-board
computer (Y page 109).
Colour display: activating/deactivating
Active Brake Assist using the on-board com-
puter (Y page 110).
Adaptive brake lamps
The adaptive brake lights warn following
traffic in an emergency situation:
If you brake the vehicle sharply from a speed
of more than 50 km/h the brake lamps flash
rapidly.
If the vehicle is sharply braked to a standstill
at a speed of over 70 km/h, the hazard warn-
ing lamps are also switched on automati-
cally. The hazard warning lamps switch off
automatically if you subsequently drive
faster than 10 km/h.
Driving with ESP
®
If ESP
®
detects that the vehicle is deviating
from the direction desired by the driver, one
or more wheels are braked to stabilise the
vehicle.
ESP
®
supports the driver when pulling away
on wet or slippery roads. ESP
®
can also sta-
58
Driving safely
>> Safety.
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