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Controls in detail
Driving systems
When DISTRONIC Plus detects a vehicle
driving ahead of you, the ring on the speed-
ometer dial lights up between the speed of
the vehicle ahead of you and set speed 2.
If DISTRONIC Plus calculates that there is
a danger of collision (
୴ page 397):
ț The distance warning lamp l in the
instrument cluster comes on.
ț An intermittent warning sounds.
̈ Immediately brake the vehicle to avoid
a collision.
Under no circumstances should the
driver await the intermittent warning
sound before braking. See the follow-
ing warning note.
The intermittent warning sound ceases
and the distance warning lamp l
goes out when the necessary distance
to the vehicle ahead is again
established.
Warning! G
An intermittent warning sounds and the dis-
tance warning lamp l in the instrument
cluster is illuminated if the DISTRONIC Plus
system calculates that the distance to the
vehicle ahead and your vehicle’s current
speed indicate that DISTRONIC Plus will not
be capable of slowing the vehicle sufficiently
to maintain the preset following distance,
which creates a danger of a collision.
Immediately brake your vehicle to increase
the distance between your vehicle and the
vehicle in front of you. The warning sound is
intended as a final caution that you have not
interceded with your own braking inputs to
avoid a potentially dangerous situation. Do
not wait for the operation of the warning sig-
nal to intercede with your own braking, as
that will result in potentially dangerous
emergency braking which will not always re-
sult in an impact being avoided.
Tailgating increases the risk of an accident.
Warning! G
DISTRONIC Plus brakes your vehicle with a
maximum of 13 ft/s
2
(4 m/s
2
). This corre-
sponds to about 40% of the maximum decel-
eration ability of your vehicle.
DISTRONIC Plus brakes the vehicle in an ef-
fort to restore the preset distance or to
maintain the speed. The brake pedal is auto-
matically applied as this happens which re-
sults in the brake pedal moving.
Keep driver’s foot area clear at all times, in-
cluding the area under the brake pedal. Ob-
jects stored in this area may impair pedal
movement which could interfere with the
braking ability of the DISTRONIC Plus sys-
tem.
Do not place your foot under the brake pedal
– your foot could become caught.