Mercedes-Benz 2009 GL-Class Automobile User Manual


 
Driving instructions
303
For more information, see “Driving through
water” (Y page 306).
Off-road driving
G
Warning!
Do not load items on the crossbars. It may
cause instability during some maneuvers
which could result in an accident.
Drive slowly in unknown terrain. This will
make it easier to recognize unexpected
obstacles and avoid damage to the vehicle.
To help avoid the vehicle rolling over, never
turn it around on steep inclines. If the
vehicle cannot complete the attempted
climb, back it down in reverse gear.
Do not drive along the side of a slope. The
vehicle might otherwise rollover. If in doing
so the vehicle begins to show a tendency
to roll, immediately steer into a line of
gravity (straight up or downhill).
Never let the vehicle roll backwards in idle.
You may lose control of the vehicle if you
use only the service brake. For information
on driving downhill, see “Driving downhill”.
G
Warning!
Sand, dirt, mud and other material having
friction property can cause exceptional
wear and tear as well as brake failure.
Have the brakes checked for dirt build-up
and cleaned. There is otherwise a risk that
full braking power may not be available in
an emergency.
G
Warning!
Please be aware that by raising the vehicle
level, the center of gravity also rises.
Therefore, always ensure that the vehicle
level is as low as possible. With higher ride
height the ESP
®
may activate earlier in
certain situations.
Read this chapter carefully before you begin
off-road travel.
Familiarize yourself with the vehicle
characteristics and gear changing before you
attempt any difficult terrain off-road driving.
We recommend that you start out with easy
off-road travel.
Special driving features for off-road
driving
The following driving features are available for
specific kind of operation:
R
Off-road ABS (Y page 77)
R
Off-road ESP
®
(Y page 80)
R
Off-road 4-ETS (Y page 78)
R
Hill start assist system (Y page 139)
R
LOW RANGE mode (Y page 142)
R
Differential locks (Y page 144)
R
Downhill Speed Regulation (DSR)
(Y page 182)
R
Off-road driving program (Vehicles without
enhanced off-road package) (Y page 185)
R
Air suspension program (Y page 185)
Off-road driving rules
R
Engage the off-road driving program
(Y page 185) or LOW RANGE mode
(Y page 142) before driving under off-road
conditions.
R
If necessary, activate differential locks
(Y page 144).
Operation
Z