Mercedes-Benz M-Class Owner's Manual page 173

Driving systems
170
erwise, the vehicle could slip sideways, tip
and overturn.
Before tackling steep downhill gradients,
R
select shift range 1.
Activate DSR. If this is not sufficient, brake
R
gently. When doing so, make sure that the
vehicle is facing in the direction of the line
of fall.
Check that the brakes are working normally
R
after a long downhill stretch.
i
Off-road ABS is activated when the off-
road program or LOW RANGE off-road gear
is selected.
At speeds below 30 km/h, the front wheels
lock cyclically during braking. The digging-
in effect achieved in the process reduces
the stopping distance when driving off-
road. The steerability of the vehicle is con-
siderably reduced if the wheels lock.
Driving systems
Cruise control
Important safety notes
G
WARNING
Do not change down for additional engine
braking on a slippery road surface. This could
cause the drive wheels to lose their grip and
the vehicle could skid.
G
WARNING
Cruise control cannot take account of road
and traffic conditions.
Always pay attention to traffic conditions
even when cruise control is activated.
Cruise control is only an aid designed to assist
driving. You are responsible for the vehicle's
speed and for braking in good time.
G
WARNING
Do not use cruise control
in traffic conditions that do not allow you to
R
drive at a constant speed (e.g. heavy traffic
or winding roads). You may otherwise
cause an accident.
on slippery roads. The drive wheels may
R
lose their grip when braking or accelerating
and the vehicle may skid.
when there is low visibility, e.g. due to fog,
R
heavy rain or snow.
General notes
Cruise control maintains a constant road
speed for you. It brakes automatically in order
to avoid exceeding the set speed. On long and
steep downhill gradients, especially if the
vehicle is laden or towing a trailer, you must
select shift range 1, 2 or 3 in good time. By
doing so, you will make use of the braking
effect of the engine. This relieves the load on
the brake system and prevents the brakes
from overheating and wearing too quickly.
Use cruise control only if road and traffic con-
ditions make it appropriate to maintain a
steady speed for a prolonged period. You can
store any road speed above 30 km/h.
Cruise control lever
To activate or increase speed
:
LIM indicator lamp
;
To activate at the current speed/last
=
stored speed
To activate or reduce speed
?
To switch between cruise control and var-
A
iable SPEEDTRONIC
To deactivate cruise control
B