Mercedes-Benz C 300 2021, Operator'S Manual

Page: 159 / 502

tion to this rest area. This function can be activa‐
ted and deactivated in the multimedia system.
If ATTENTION ASSIST is deactivated, the
Û
symbol appears in the assistance graphic in the
Instrument Display when the engine is running.
ATTENTION ASSIST is activated automatically
when the engine is re-started. The last selected
sensitivity level remains stored.
System limits
ATTENTION ASSIST is active in the 37 mph
(60 km/h) to 124 mph (200 km/h) speed range.
Particularly in the following situations, ATTEN‐
TION ASSIST only functions in a restricted man‐
ner and warnings may be delayed or not occur:
R
If you have been driving for less than approx‐
imately 30 minutes.
R
If the road condition is poor (uneven road
surface or potholes).
R
If there is a strong side wind.
R
If you adopt a sporty driving style (high cor‐
nering speeds or high rates of acceleration).
R
If the Steering Assist function of Active Dis‐
tance Assist DISTRONIC is active.
R
If the time has been set incorrectly.
R
If you change lanes and vary your speed fre‐
quently In active driving situations.
The ATTENTION ASSIST drowsiness or alertness
assessment is reset and restarted when continu‐
ing the journey in the following situations:
R
If you switch off the engine.
R
If you unfasten your seat belt and open the
driver's door (e.g. to change drivers or take a
break).
Setting ATTENTION ASSIST
Multimedia system:
4
Vehicle
5
k Assistance
5
ATTENTION ASSIST
Setting options
#
Select Standard , Sensitive or Off .
Suggesting a rest area
#
Select Suggest Rest Area .
#
Activate O or deactivate the function ª .
If ATTENTION ASSIST detects fatigue or
increasing lack of attention, it suggests a
rest area in the vicinity.
#
Select a suggested rest area: you are gui‐
ded to the selected rest area.
Speed control cruise control
Function of cruise control
Cruise control regulates the speed to the value
selected by the driver.
If you accelerate to overtake, for example, the
stored speed is not deleted. If you remove your
foot from the accelerator pedal after overtaking,
cruise control will resume speed regulation back
to the stored speed.
You can store any speed above 15 mph
(20 km/h) up to the maximum design speed.
Observe the notes on driving systems and your
responsibility; you may otherwise fail to recog‐
nize dangers (
/
page 150).
Driving and parking 157