Mercedes-Benz S-Class Saloon W223 2021 Owner's Manual page 247

If autonomous braking or situation-dependent
braking assistance has occurred, pop up
appears in the driver display and then automati-
cally goes out after a short time.
If the autonomous braking function or the situa-
tion-dependent braking assistance is triggered,
additional preventive measures for occupant pro-
®
tection (PRE-SAFE ) may also be initiated.
& WARNING Risk of an accident caused by
limited detection performance of Active
Brake Assist
Active Brake Assist cannot always clearly iden-
tify objects and complex traffic situations.
In such cases, Active Brake Assist might:
Give a warning or brake without reason
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Not give a warning or not brake
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Active Brake Assist is only an aid. The driver is
responsible for maintaining a sufficiently safe
distance to the vehicle in front, vehicle speed
and for braking in good time.
Always pay careful attention to the traffic
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situation; do not rely on Active Brake
Assist alone.
1
Be prepared to brake or swerve if neces-
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sary.
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If Active Brake Assist is deactivated, æ
appears in the driver display.
If the system is unavailable or the functions
are restricted, Ä appears.
Also observe the system limits of Active Brake
Assist.
P223 0288 02
Driving and parking 245
The individual subfunctions are available in the fol-
lowing speed ranges:
The distance warning function issues a warning in
the following situations:
From approximately 30 km/h, if over several
R
seconds the distance maintained to the vehi-
cle travelling in front is insufficient for the
driven speed, the L distance warning lamp
lights up in the driver display.
From approximately 7 km/h, if your vehicle is
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critically close to a vehicle, cyclist or pedes-
trian, you will hear an intermittent warning
tone and the L distance warning lamp
lights up in the driver display.
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Vehicles with PRE-SAFE : depending on the
country, an additional haptic warning occurs
in the form of slight, repeated tensioning of
the seat belt.
If possible, brake immediately or manoeuvre to
avoid the obstacle.