Mercedes-Benz S 450 4MATIC Operator's Manual page 476

The position of the gear selector lever de-
termines which warning indicators will be
activated.
Gear selector Warning indicator
lever position
D Front area activated
R or N Front and rear area
activated
P Neither activated
As your vehicle approaches an object, one
or more distance segments will illuminate,
depending on the distance. When the sev-
enth distance segment illuminates, you
have reached the minimum distance.
Front area:
An intermittent acoustic warning will
sound as the first red distance segment
illuminates and a constant acoustic
warning lasting a maximum of
2 seconds will sound for the second
red distance segment. The signal is
canceled when the gear selector lever
is placed in park position P.
Rear area:
An intermittent acoustic warning will
sound as the first red distance segment
illuminates and a constant acoustic
warning lasting a maximum of
2 seconds will sound for the second
red distance segment. The signal is
canceled when the gear selector lever
is placed in drive position D or park
position P.
Controls in detail
Driving systems
Switching on or off Parktronic system
The Parktronic system can be switched off
manually.
1 Parktronic button
2 Indicator lamp
475