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Setting a speed
Keep in mind that it may take a brief moment
until the vehicle has accelerated or braked to
the speed set.
X
To adjust the set speed in 5 mph incre-
ments (10 km/h increments): briefly press
the cruise control lever up : past the pres-
sure point for a higher speed, or down ; for
a lower speed.
X
To adjust the set speed in 1 mph incre-
ments (1 km/h increments): briefly press
the cruise control lever up : to the pressure
point for a higher speed, or down ; for a
lower speed.
i
Cruise control is not deactivated if you
depress the accelerator pedal. For example, if
you accelerate briefly to overtake, cruise con-
trol adjusts the vehicle's speed to the last
speed stored after you have finished overtak-
ing.
Deactivating cruise control
There are several ways to deactivate cruise con-
trol:
X
Briefly press the cruise control lever forwards
=.
or
X
Brake.
Cruise control is automatically deactivated if:
R
the vehicle is secured with the electric park-
ing brake
R
you are driving at less than 20 mph (30 km/h)
R
ESP
®
intervenes or you deactivate ESP
®
R
you shift the transmission to position i
while driving
If cruise control is deactivated, you will hear a
warning tone. You will see the Cruise Con‐Cruise Con‐
trol Offtrol Off message in the multifunction display
for approximately five seconds.
i
When you switch off the engine, the last
speed stored is cleared.
Active Distance Assist DISTRONIC
General notes
Active Distance Assist DISTRONIC regulates the
speed and automatically helps you maintain the
distance from the vehicle detected in front.
Vehicles are detected with the aid of the radar
sensor system. Active Distance Assist
DISTRONIC brakes automatically to avoid
exceeding the set speed or to maintain the des-
ignated distance from the vehicle in front.
If Active Distance Assist DISTRONIC detects
that there is a risk of a collision with the vehicle
in front, you will be warned visually and audibly.
Active Distance Assist DISTRONIC cannot pre-
vent a collision without your intervention. An
intermittent warning tone will then sound and
the distance warning lamp will light up in the
instrument cluster. Brake immediately in order
to increase the distance to the vehicle in front or
take evasive action provided it is safe to do so.
Active Distance Assist DISTRONIC operates in
the speed range between 0 mph (0 km/h) and
120 mph (200 km/h).
Change into a lower gear in good time on long
and steep downhill gradients. This is especially
important if the vehicle is laden. 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 wear-
ing too quickly.
Do not use Active Distance Assist DISTRONIC
on roads with steep gradients.
For Active Distance Assist DISTRONIC to assist
you when driving, the radar sensor system must
be operational.
As Active Distance Assist DISTRONIC transmits
radar waves, it can resemble the radar detectors
of the responsible authorities. You can refer to
the relevant chapter in the Operator's Manual if
questions are asked about this.
i
USA only: This device has been approved by
the FCC as a "Vehicular Radar System". The
radar sensor is intended for use in an auto-
motive radar system only. Removal, tamper-
ing, or altering of the device will void any war-
ranties, and is not permitted by the FCC. Do
not tamper with, alter, or use in any non-
approved way.
Any unauthorized modification to this device
could void the user's authority to operate the
equipment.
152
Driving systems
Driving and parking
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