Mercedes-Benz Actros 2017, Operating Instructions Manual

Page: 259 / 436

Crawler mode
General notes
Crawler mode enables the vehicle to crawl for-
wards automatically when the service brake is
released and to coast in neutral when the accel-
erator pedal is not depressed. After crawling
forwards, the vehicle coasts in neutral until you
bring the vehicle to a halt using the service brake
or until crawler mode is deactivated/cancelled.
Crawling and coasting are possible in all pulling-
away gears. You can shift gear manually, e.g. in
a traffic jam, and adjust your coasting speed to
the traffic conditions.
Crawler mode is deactivated automatically if:
R
you shift the transmission to neutral position
i
for longer than approximately 2 seconds
R
you apply the parking brake
R
you activate the rocking-free drive function
R
the distance control assistant intervenes
R
the idling speed is above approximately
700 rpm
R
Active Brake Assist has intervened
R
backup drive mode is enabled
R
the clutch is about to overload
R
a change of direction cannot be performed
If no further conditions are met, crawler mode is
reactivated when you pull away using the accel-
erator pedal.
Crawler mode is cancelled automatically when
its functional limits are reached.
This is the case if:
R
the vehicle does not move, e.g. due to unex-
pectedly high driving resistance
R
the wheels spin, e.g. on slippery road surfaces
R
driving resistance exceeds a predetermined
value when crawling/coasting in neutral
If crawler mode has been cancelled automati-
cally, the on-board computer shows the
Crawler mode cancelled
event window. A
warning tone sounds and the transmission con-
trol disengages the clutch. In this case, depress
the brake pedal to bring the vehicle to a halt or
depress the accelerator pedal to pull away
again. If you do not depress the brake or accel-
erator pedal, crawler mode is deactivated. It will
only be available again when you pull away by
depressing the accelerator pedal.
On vehicles without a driven front axle, crawler
mode is adapted for road driving. Crawler mode
tuned for road driving can be deactivated and
activated using the
Systems
menu window in
the
ä
settings menu (
Y
page 151).
In the offroad gearshift program, the crawler
mode adapted for road driving is always deacti-
vated. The crawler mode adapted specially for
off-road driving can be activated and deactiva-
ted in all permissible pulling-away gears using
the
í
button (
Y
page 257).
In standard drive program
A
and in the other
gearshift programs, crawler mode adapted for
road driving is always activated once the engine
is started.
On vehicles with all-wheel drive, crawler mode is
always deactivated once the engine is started.
When you activate the corresponding crawler
mode, it is activated after you pull away for the
first time. The maximum torque for crawler
mode is not available when crawling for the first
time after the mode has been activated.
If you switch to the manual drive program, the
current crawler mode remains active. If you then
switch back to the automatic drive program, the
crawler mode assigned to that drive and gear-
shift program is activated. It may only be avail-
able again when you next pull away by depress-
ing the accelerator pedal.
Activating or deactivating crawler mode
with the button (all-wheel drive vehicles)
The crawler mode adapted especially for off-
road driving and all-wheel drive vehicles is
always deactivated once the engine is started.
The indicator lamp in the
í
button lights up.
X To activate: select a pulling-away gear.
X Press the lower section of the
í
button.
The indicator lamp in the
í
button goes
out.
X Depress the accelerator pedal and pull away.
Crawler mode is activated.
Automated transmission
257
Driving mode
Z