Mercedes-Benz E-Class Operator's Manual page 155

& WARNING Risk of an accident caused by
limited detection performance of Active
Brake Assist
Active Brake Assist cannot always clearly
identify objects and complex traffic situa‐
tions.
In such cases, Active Brake Assist might:
give an unnecessary warning or brake the
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vehicle
not give a warning or not brake the vehi‐
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cle.
Always pay careful attention to the traf‐
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fic situation; do not rely on Active Brake
Assist alone.
Be ready to brake and take evasive
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action if necessary.
Also observe the system borders of Active Brake
Assist.
The individual subfunctions are available in
the following speed ranges:
Distance warning function
The distance warning function issues a warning
at speeds:
From approximately 18 mph (30 km/h), if
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over several seconds the distance main‐
tained to the vehicle traveling in front is
insufficient for the driven speed. The dis‐
Driving and parking 153
tance warning lamp then lights up in the
instrument cluster ·.
From approximately 4 mph (7 km/h), if your
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vehicle is critically close to a vehicle or
pedestrian. An intermittent warning tone
sounds and the distance warning lamp lights
up in the instrument cluster ·.
Brake immediately or take evasive action, provi‐
ded it is safe to do so.