The selected units apply to:
R
the analogue speedometer
R
the total distance recorder and the trip
meter
R
the trip computer
R
the digital speedometer in the
Trip
menu
R
the distance values in the navigation sys-
tem*
R
cruise control
R
Speedtronic
R
Distronic Plus*
R
the ASSYST PLUS service interval display
The digital speedometer shows alternative
speed units (
Y
page 242).
X
Press the
=
or
;
button to select the
Settings
menu.
X
Press
9
or
:
to select
Units
.
X
Press the
a
button.
X
To select a different display unit: press
a
again.
The unit switches
km/h
and
mph
.
Switching belt adjustment* on/off
Further information on belt adjustment
(
Y
page 205).
X
Press the
=
or
;
button to select the
Settings
menu.
X
Press
9
or
:
to select
Belt
adjustment
.
X
Press the
a
button.
X
To activate/deactivate: press
a
again.
Activating/deactivating the radar sen-
sor system*
!
You must deactivate the radar sensor sys-
tem in certain countries and near radio
telescope facilities. Further information
can be found in the index under "Radar
sensor system".
Vehicles with a navigation system*: the radar
sensor system is deactivated automatically if
you are close to radio telescope facilities.
The following systems are switched off when
the radar sensor system is deactivated:
R
Distronic Plus* (
Y
page 246)
R
BAS PLUS* (
Y
page 54)
R
Parking Guidance* (
Y
page 262)
R
PRE-SAFE
®
Brake* (
Y
page 57)
R
Blind Spot Assist* (
Y
page 272)
X
Press the
=
or
;
button to select the
Settings
menu.
X
Press
9
or
:
to select
Radar sen‐
sor system
.
X
Press the
a
button.
X
To activate/deactivate: press
a
again.
Driving systems
Overview of driving systems
The vehicle's driving systems are described
on the following pages:
R
cruise control, Distronic Plus* and Speed-
tronic, which are used to control the speed
of the vehicle
R
HOLD, which makes pulling away easier,
particularly on steep uphill gradients
R
AIRMATIC and Active Body Control* (ABC),
which is used to adjust the vehicle’s sus-
pension system
R
4MATIC* (permanent four-wheel drive), for
optimum traction
R
PARKTRONIC* and Parking Guidance*,
which assist you in finding a parking space
and in manoeuvring into it
Driving systems
243
Contr
ols
* optional
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