Mercedes-Benz Actros 2017, Operating Instructions Manual

Page: 252 / 436

Vehicles with manual transmission: if you do
not depress the accelerator, clutch or brake
pedal while the vehicle is stationary and the hill
holder is active, a warning tone sounds. The hill
holder is deactivated and the
¿
indicator
lamp in the instrument cluster goes out.
When your vehicle's brake pedal is depressed
until the vehicle is stationary while the hill holder
is activated, the hill holder is active and the
¿
indicator lamp in the instrument cluster
lights up.
If you then apply the parking brake, the hill
holder is deactivated and the
¿
indicator
lamp in the instrument cluster goes out. The
vehicle is then held by the parking brake. After
the parking brake is released, the hill holder is
no longer active. If you depress the brake pedal,
the hill holder remains active after the parking
brake is released.
If you depress the accelerator pedal and the
vehicle pulls away, the hill holder is released
automatically. The
¿
indicator lamp in the
instrument cluster goes out.
The hill holder remains activated in forward and
reverse gear even after a brief stop or after the
engine is switched off.
Vehicles with automated manual transmis-
sion: if crawler mode is active, the hill holder is
automatically released when the vehicle begins
to creep forward after the service brake has
been released.
Crawler mode is cancelled automatically when
its functional limits are reached (
Y
page 257).
The on-board computer then displays 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.
Continuous brake
Important safety notes
G
WARNING
If you activate the continuous brake or shift to
a lower gear on a slippery road surface in
order to increase the engine's braking effect,
the drive wheels may lose traction. There is an
increased risk of skidding and an accident.
Do not activate the continuous brake and do
not shift to a lower gear in order to increase
the engine's braking effect on a slippery road
surface.
G
WARNING
If there is a retarder or retarder control mal-
function, braking characteristics can change.
The vehicle can brake uncontrollably. The
wheels can block and thus lose traction on
slippery road surfaces. This can cause the
vehicle to skid. There is a risk of an accident.
Drive with even greater care or stop the vehi-
cle immediately in accordance with the traffic
conditions. Have the retarder checked and
repaired immediately at a qualified specialist
workshop.
Always observe the warning lamps and dis-
play messages and follow the described
measures.
The engine brake and retarder are used as a
continuous brake.
You can utilise the engine's braking effect, par-
ticularly on long downhill gradients if you:
R
activate the continuous brake
R
shift to a lower gear in good time
The continuous brake is activated automatically
if:
R
after several brake applications, the vehicle
electronics detect that the vehicle is loaded
and you then depress the brake pedal
R
cruise control, speed limiter or distance con-
trol assistant intervene in overrun mode
Activating/deactivating the continuous
brake
! If the continuous brake is deactivated and
the
Ã
indicator lamp in the instrument
cluster does not go out, have the continuous
brake checked at a qualified specialist work-
shop.
250
Brakes
Driving mode