Winter Operation; Important Safety Notes - Mercedes-Benz Unimog Operating Instructions Manual

Example: connections for trailer
Brake line hose coupling (yellow)
:
Reservoir line hose coupling (red)
;
Power socket, 12 V
=
ABS socket, 7-pin
?
Socket, 24 V
A
Connecting cables and compressed-air
lines
X
Connect the power supply to 12 V = or
24 V A socket.
X
Connect the control cable to ABS
socket ?.
X
Connect brake line coupling head : (yel-
low).
X
Connect supply line coupling head ; (red).
X
After connecting the compressed-air lines
to the vehicle, adjust the brake pressure
regulator (if installed) on the trailer (see
manufacturer's operating instructions).
X
Check that the lighting system on the trac-
tor vehicle and trailer is clean and working
correctly.
X
Check that the trailer brake system is work-
ing correctly.
Disconnecting cables and compressed-
air lines
G
WARNING
If you disconnect the hose couplings in the
wrong order, the trailer brake is released and
the trailer could roll away. There is a risk of
accident.

Winter operation

Make sure that you observe the correct order
when disconnecting the hose couplings.
! After disconnecting the compressed-air
lines, ensure that the covers of the coupling
heads on the vehicle are closed. If the cov-
ers are not closed, the coupling heads may
become contaminated, causing a malfunc-
tion.
X
Disconnect the power supply from 12 V =
or 24 V A socket.
X
Disconnect the control cable from ABS
socket ?.
X
Apply the parking brake of the towing vehi-
cle ( Y page 166).
X
Chock the trailer wheels.
X
Apply the trailer's parking brake, see the
manufacturer's operating instructions.
X
Detach reservoir line coupling head ;
(red).
X
Detach brake line coupling head : (yel-
low).
Winter operation
Driving in winter

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.
221
Z