Mercedes-Benz 2012 A Class - Manual (Page 176)

This speed can:
R
be too high for a filter lane or a slip road
R
be so high in the right lane that you pass
vehicles driving on the left
R
be so high in the left lane that you pass
vehicles driving on the right
If there is a change of drivers, advise the new
driver of the speed stored.
General notes
DISTRONIC PLUS regulates the speed and
automatically helps you maintain the dis-
tance to the vehicle detected in front. DIS-
TRONIC PLUS brakes automatically so that
the set speed is not exceeded.
You must select a lower gear in good time on
long and steep downhill gradients, especially
if the vehicle is laden or towing a trailer. For
this, you need to have selected manual drive
program
M( Y page 166). By doing so, you will
make use of the braking effect of the engine.
This relieves the load on the brake system and
prevents the brakes from overheating and
wearing too quickly.
If a slower-moving vehicle is detected in front,
DISTRONIC PLUS brakes your vehicle. It
maintains the preset distance to the vehicle
in front.
If DISTRONIC PLUS detects that there is a risk
of a collision, you will be warned visually and
acoustically. Without your intervention, DIS-
TRONIC PLUS cannot prevent a collision. An
intermittent warning tone will then sound and
the distance warning lamp will light up in the
instrument cluster. Brake immediately to
increase the distance to the vehicle driving in
front, or take evasive action, provided it is
safe to do so.
The radar sensor system is switched off auto-
matically in the vicinity of radio telescope
facilities (
Y page 350).
For DISTRONIC PLUS to assist you when driv-
ing, the radar sensor system must be:
R
activated ( Y page 223)
R
operational
i In some countries you must deactivate
the radar sensor system ( Y page 223).
For further information about the radar sen-
sor system; see (
Y page 350).
DISTRONIC PLUS is automatically deactiva-
ted if:
R
you are driving slower than 25 km/h and
there is no longer a vehicle in front or
R
the vehicle ahead has not been detected
If there is no vehicle in front, DISTRONIC
PLUS operates in the same way as cruise
control in the speed range between
30 km/h and 200 km/h. If a vehicle is driving
in front of you, it operates in the speed range
between 0 km/h and 200 km/h.
Do not use DISTRONIC PLUS on roads with
steep gradients.
Cruise control lever
With the cruise control lever, you can operate
DISTRONIC PLUS and variable SPEED-
TRONIC.
The LIM indicator lamp on the cruise control
lever indicates which system you have selec-
ted:
R
LIM indicator lamp off: DISTRONIC PLUS
is selected.
R
LIM indicator lamp on: variable SPEED-
TRONIC is selected.
:
To store the current speed or a higher
speed
;
To set the specified minimum distance
=
LIM indicator lamp
174
Driving systems
Driving and parking