Mercedes-Benz 2009 GL320 BlueTEC Operator's Manual page 192

Controls in detail
Driving systems
Level Ride height
Off-road 1 +1.2 in (30 mm)
9 +/-0 in (0 mm)
Highway
Highspeed -0.6 in (-15 mm)
i Vehicles with ADS:
Depending on the ADS setting
( Y page 185), the vehicle will be lowered to
the highspeed level when traveling at
higher speeds. At speeds below 40 mph
(64 km/h) at the latest, it will be returned
to the highway level.
i
The highspeed level is not available when
towing a trailer. For more information on
towing a trailer, see "Trailer
towing" ( Y page 310).
You can only select the off-road levels below
a certain speed. At higher speeds, the
message Level Selection Not Permitted
appears in the multifunction display.
9 Ground clearance: 8.5 in (217 mm)
190
You can select
Off-road level 1: selectable below 60 mph
R
(96 km/h)
Off-road level 2: selectable below 40 mph
R
(64 km/h)
Off-road level 3: selectable below 12 mph
R
(20 km/h)
Off-road levels
G Warning!
Vehicle off-road level 3 is not intended for
use on paved roads. This vehicle level is
intended for clearing impracticable
situations at low speed exclusively. The
vehicle has a very high center of gravity in
off-road level 3. This increases the
overturning hazard.
Select off-road level 3 exclusively for
R
clearing impracticable situations at low
speed.
Adapt your driving style to the modified
R
conditions.
Do not exceed a speed of 12 mph
R
(20 km/h).
Avoid extreme, quick steering
R
movements.
Keep in mind the vehicle's driving
R
characteristics are modified.
You should therefore drive in off-road
level 3 with particular caution as it could
otherwise lead to an accident and/or
serious injury to you or others.
If you are driving too fast while using off-road
level 3, you will see the following message in
the multifunction display:
Reduce speed to under 12 MPH
km/h)
(20
In addition, an acoustic signal sounds.
i
This message cannot be deactivated.
For more information, see "Display
messages" ( Y page 351)
Only use off-road levels when necessary.
Otherwise the fuel consumption may
increase and/or the handling characteristics
of the vehicle may be unfavorable.
X
Start the engine.
X
Turn outer adjustment ring
until indicator lamp of the desired level
3
flashes.
repeatedly
1