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A different number of segments 2 will appear
in front of the vehicle depending on the distance
to the event ahead:
R
Few segments: the event ahead is near.
R
Many segments: the event ahead is further
away.
When the vehicle nears the event, ECO Assist
will calculate the optimal speed for maximum
fuel economy and recuperative energy based on
the distance, speed and downhill gradient. The
Foot off the Accelerator message 3 appears on
the multifunction display. The first segments in
front of the vehicle will turn green. The remain‐
ing segments will initially stay white. If the driver
lifts off the accelerator pedal in good time, the
remaining segments on the display will turn
green until the event shown is reached. The driv‐
etrain will be set for maximum fuel economy.
Recuperation will charge the battery. Recupera‐
tion will be adapted to the selected drive pro‐
gram.
The event will be shown for a short time after it
has been passed. If there is no response to the
Foot off the Accelerator prompt, the segments
will remain white.
If the event involves a vehicle ahead, all seg‐
ments will immediately turn green once there is
a response to the Foot off the Accelerator
prompt.
For Active ECO Assist in drive program ;,
symbol 3 will appear on the multifunction dis‐
play and on the head-up display beside transmis‐
sion position h. Symbol 3 will also appear
when the assistant display is not selected.
If the system does not intervene during the
event ahead, nothing will be displayed. The sys‐
tem is passive.
ECO Assist is active only in drive programs ;
and A.
System limits
ECO Assist can function more precisely if the
route is maintained when route guidance is
active. The basic function is also available with‐
out active route guidance. Not all information
and traffic situations can be foreseen. The qual‐
ity depends on the map data.
ECO Assist is only an aid. The driver is responsi‐
ble for keeping a safe distance to the vehicle in
front, for vehicle speed and for braking in good
time. The driver must be ready to brake at all
times irrespective of whether the system inter‐
venes.
The system may be impaired or may not function
in the following situations:
R
If visibility is poor (e.g. due to insufficient illu‐
mination of the road, highly variable shade
conditions, rain, snow, fog or heavy spray).
R
If there is glare (e.g. from oncoming traffic,
direct sunlight or reflections).
R
If there is dirt on the windshield in the vicin‐
ity of the multifunction camera or the camera
is fogged up, damaged or obscured.
R
If the traffic signs are hard to discern (e.g.
due to dirt, snow or insufficient lighting, or
because they are obscured).
R
If the information on the navigation system's
digital map is incorrect or out of date.
R
If the signs are ambiguous (e.g. traffic signs
in roadworks or in adjacent lanes).
172
Driving and parking
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