X
Switch off the auxiliary heating system
(Y page
133).
X
Unlock cap :
on AdBlue
®
tank ; with the
separate key.
i
Depending on the vehicle's equipment
cap : of AdBlue
®
tank ; can be locked
for security reasons.
Always
refuel with at least 10% of the AdBlue
®
reservoir capacity, as topping up with smaller
amounts could result in malfunctions.
Trailers/semitrailers
Notes about the trailer/semitrailer
coupling
The
trailer or semitrailer coupling is one of the
vehicle components with particular impor-
tance for road safety. Please comply precisely
with the manufacturer’s operating, care and
maintenance instructions.
If you fit a trailer coupling, observe the body/
equipment mounting directives.
If your semitrailer tractor vehicle is equipped
with a coupling ramp/coupling aid, the incli-
nation angle specified in ISO 1726 cannot be
guaranteed for all semitrailer coupling dimen-
sions. Note that the clearance between the
semitrailer tractor vehicle and the semitrailer
may be restricted, and you should adapt your
driving style accordingly. Always remove the
mudguard centre sections before coupling
up.
If you retrofit a coupling ramp/coupling aid,
observe the body/equipment mounting
directives.
Driving tips for trailers/semitrailers
General notes
!
Always observe the following safety
instructions for driving with trailers and
semitrailers:
R
only attach a trailer/semitrailer at an
appropriate trailer/semitrailer coupling.
R
ensure there is adequate clearance
between the trailer/semitrailer and the
tractor vehicle.
R
if the vehicle is being driven without a
load,
only a trailer without a load may be
coupled up.
R
do not exceed the permissible axle loads.
R
adhere to a minimum front axle load. This
ensures adequate steerability for the
tractor vehicle.
Minimum front axle load — tractor vehi-
cle:
25% = three-axle vehicle
30% = two-axle vehicle (trailer lighter or
as heavy as the tractor vehicle)
35% = two-axle vehicle (trailer heavier
than the tractor vehicle)
i
On vehicles with pneumatic suspension
and axle load indicators, the current axle
loads can be called up on the on-board
computer (Y page 154).
Articulation angles
!
If the articulation angle is exceeded, the
tractor vehicle and the trailer/semitrailer
can be damaged.
308
Trailers/semitrailers
Driving mode
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