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200 Driving and parking
If a warning is given in the driver display, the
multimedia system offers to search for a rest
area. You can select a rest area and start naviga‐
tion to this rest area.
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 60 km/h to
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:
If you have been driving for less than approx‐
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imately 30 minutes.
If the road condition is poor (uneven road
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surface or potholes).
If there is a strong side wind.
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If you adopt a sporty driving style (high cor‐
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nering speeds or high rates of acceleration).
If the Steering Assist function of Active Dis‐
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tance Assist DISTRONIC is active.
If the clock is set to the incorrect time.
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If you change lanes and vary your speed fre‐
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quently In active driving situations.
Also observe any information regarding display
messages that can be displayed in the driver dis‐
play.
The ATTENTION ASSIST drowsiness or alertness
assessment is reset and restarted when continu‐
ing the journey in the following situations:
If you switch off the engine.
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If you unfasten your seat belt and open the
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driver's door (e.g. to change drivers or take a
break).
Cruise control and limiter
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 20 km/h up to
the maximum design speed or up to the set win‐
ter tyre limit.
Observe the notes on driving systems and your
responsibility; you may otherwise fail to recog‐
nise dangers (
page 192).
/
Messages in the driver display
h (grey): cruise control is selected but
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not yet active, or temporarily passive.
h (green): cruise control is active.
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A stored speed appears under the h display
and is indicated in the speedometer.
System limits
Cruise control may be unable to maintain the
stored speed on uphill gradients. The stored
speed is resumed when the gradient evens out.
Change into a lower gear in good time on long
and steep downhill gradients. Take particular
note of this when driving a laden vehicle. By
doing so, you will make use of the engine's brak‐
ing effect. This relieves the load on the brake
system and prevents the brakes from overheat‐
ing and wearing too quickly.
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