Observe the notes on warning and indicator
lamps (Y page 302) as well as display mes-
sages (Y page 263) (4-button multifunction
steering wheel) and (Y page 268) (12-button
multifunction steering wheel).
ADAPTIVE BRAKE
ADAPTIVE BRAKE enhances braking safety
and offers increased braking comfort. In addi-
tion to the braking function, ADAPTIVE BRAKE
also has the HOLD function (Y page 206) and
hill start assist (Y page 170). For further
information, see "Driving tips" (Y page 190).
PRE-SAFE
®
Brake
General notes
i
Observe the "Important safety notes" sec-
tion (Y page 76).
PRE-SAFE
®
Brake is only available on vehicles
with DISTRONIC PLUS.
For PRE-SAFE
®
Brake to assist you when driv-
ing, the radar sensor system must be opera-
tional.
With the help of the radar sensor system,
PRE-SAFE
®
Brake can detect obstacles that
are in front of your vehicle for an extended
period of time.
PRE-SAFE
®
Brake can help you to minimise
the risk of a collision with a vehicle ahead, and
reduce the effects of such a collision. If PRE-
SAFE
®
Brake has detected a risk of collision,
you will be warned visually and acoustically
as well as by automatic braking. PRE-SAFE
®
Brake cannot prevent a collision without your
intervention.
Important safety notes
G
WARNING
PRE-SAFE
®
Brake will initially brake your vehi-
cle by a partial application of the brakes if a
danger of collision is detected. There may be
a collision unless you also brake. Automatic
emergency braking cannot prevent a colli-
sion. There is a risk of an accident.
Always apply the brakes yourself and try to
take evasive action.
G
WARNING
PRE-SAFE
®
Brake cannot always clearly iden-
tify objects and complex traffic conditions.
In these cases, PRE-SAFE
®
Brake may:
R
give an unnecessary warning and then
brake the vehicle
R
neither give a warning nor intervene
There is a risk of an accident.
Always pay particular attention to the traffic
situation and be ready to brake, especially if
PRE-SAFE
®
Brake warns you. Terminate the
intervention in a non-critical driving situation.
In order to maintain the appropriate distance
to the vehicle in front and thus prevent a col-
lision, you must apply the brakes yourself.
G
WARNING
PRE-SAFE
®
Brake does not react:
R
to people or animals
R
to oncoming vehicles
R
to crossing traffic
R
when cornering
As a result, PRE-SAFE
®
Brake may neither
give warnings nor intervene in all critical sit-
uations. There is a risk of an accident.
Always pay careful attention to the traffic sit-
uation and be ready to brake.
In the event of snowfall or heavy rain, recog-
nition can be impaired.
Recognition by the radar sensor system is
also impaired in the event of:
R
dirt on the sensors or the sensors are
obscured
R
interference by other radar sources
R
strong radar reflections, for example, in
multi-storey car parks
Driving safety systems
83
Safety
Z
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