Mercedes-Benz 2009 R-Class Operator's Manual page 170

Controls in detail
Driving systems
i The third available level is the highspeed
level that is set automatically.
The following is the approximate change in
ride height for each of the level settings:
Level Ride height
Raised +1.97 in (50 mm)
Highway +/-0 in (0 mm)
Highspeed -0.78 in (-20 mm)
i The vehicle is lowered to the highspeed
level automatically if the vehicle speed is
above 70 mph (112 km/h) or if the vehicle
speed stays between 60 mph (96 km/h)
and 70 mph (112 km/h) for
approximately 20 seconds.
i The highspeed level is not available when
towing a trailer. For more information on
towing a trailer, see "Trailer
towing" ( Y page 283).
i
Obey local speed limits. Use prudent
driving speeds appropriate to prevailing
conditions.
168
Raised level
Only select the raised level if appropriate for
the driving situation encountered. Otherwise
the fuel consumption may increase and/or
the handling characteristics of the vehicle
may be unfavorable.
i You can select the raised level at speeds
up to 25 mph (40 km/h). At higher speeds,
Level Selection Not
the message
n
Permitted appears in the multifunction
display.
X
Start the engine.
When indicator lamp is off:
2
X
Press switch 1.
Indicator lamp flashes. The vehicle
2
adjusts to the raised level.
The following message appears in the
multifunction display while the level is
being set:
When the raised level is reached, indicator
lamp comes on continuously and the
2
following message appears in the
multifunction display:
i The messages can be cleared by pressing
button or on the multifunction
æ ç
steering wheel.
Highway level
! Keep in mind that on rough or uneven
roads, adjusting the vehicle to a lower level
may cause the vehicle underbody to come
in contact with the road and result in
damage to the vehicle underbody. Always
make sure the vehicle has sufficient ground
clearance before adjusting it to a lower
level.
X
Close all doors and the tailgate.
X
Start the engine.