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Driver assistance systems
Traffic Jam Assist
Description and oper
ation
Fig. 280 Related video
Traffic Jam Assist helps the driver keep the
car within its l
ane and t
o mo
ve in convoy in
case of traffic congestion or slow traffic.
Traffic Jam Assist is an additional function of
Lane Assist
›››
page 284 and combines Lane
Assist functions with Adaptive Cruise Control
(ACC)
›››
page 275. Therefore, it is essential
that you read these two chapters carefully
and note the limitations of the systems and
the information about them.
Operation of Traffic Jam Assist
At speeds of below 60 km/h (40 mph), Traffic
Jam Assist can maintain a (temporary) dis-
tance preset by the driver with respect to the
vehicle ahead and help stay within the lane
›››
.
T
o do this, the syst
em aut
omatically controls
the accelerator, brakes and steering, and
slows the vehicle, stopping it fully if neces-
sary, when faced with a vehicle in front that
has stopped. It automatically moves off again
when the vehicle ahead moves.
Traffic Jam Assist is designed only for use on
motorways and wide roads. Therefore, never
use it in city traffic.
Technical requirements for using Traffic
Jam Assist
●
Lane departure warning must be activated:
Infotainment button /
and the Vehi-
cle > SETTINGS > Driver assistance >
Lane departure warning (Lane Assist)
function butt
on
›
›
›
page 35.
●
The Lane Centring Guide must be activa-
ted: Infotainment button /
and the
Vehicle > SETTINGS > Driver assis-
tance > Lane departure warning (Lane
Assist) function butt
on.
●
Adaptiv
e Cruise Contr
ol (ACC) must be
connected and active
›››
page 278.
●
The speed must be below 60 km/h
(38 mph).
Traffic Jam Assist is not active (the Lane
Assist control light turns yellow)
●
If any of the conditions mentioned on
page 287, Technical requirements for us-
ing Traffic Jam Assist are no longer met.
●
If any of the conditions required for opera-
tion of the Lane Assist are not met
›››
page 284.
●
If any of the conditions necessary for the
adaptive cruise control (ACC) to work are no
longer fulfilled
›››
page 275.
Situations in which Traffic Jam Assist must
be switched off
Due to the limitations of the system, Traffic
Jam Assist must always be switched off in the
following situations:
●
When more attention is required by the
driver.
●
When driving in a very sporty style.
●
In adverse weather conditions, e.g. in case
of snow or heavy rain.
●
When driving on roads in poor condition.
●
In sections with roadworks.
●
In city journeys.
WARNING
The smart technology incorporated into
Traffic Jam Assist cannot defy the l
aws of
physics; it only works within the limits of the
system. Accidents and severe injury may
occur if Traffic Jam Assist is used negli-
gently or involuntarily. The system is not a
replacement for driver awareness.
●
Adapt your speed and safe distance to
the vehicle in front of you at all times to suit
the visibility, weather, road and traffic con-
ditions.
»
287
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