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When cleaning the vehicle exterior, ensure that
you never directly aim the water jet at the hydrau‐
lic fluid reservoir cover fitted with a vent filter.
Visual check
* NOTE Operating lifespan of the hydraulic
hose
Hydraulic hoses are marked with a use-by
date (six years after the date of manufacture).
Hydraulic hoses must be replaced by a
#
qualified specialist workshop at the end
of this operating lifespan at the latest,
even if there is no visible damage to
them.
Check the components of the hydraulic system of
the tractor/semitrailer combination, and in par‐
ticular the hydraulic lines, on a weekly basis for
leaks, external damage and operating lifespan.
Have defective and leaking components repaired
immediately at a qualified specialist workshop.
Checking the hydraulic fluid level and top‐
ping up hydraulic fluid
+
ENVIRONMENTAL NOTE Environmental
damage due to hydraulic fluid level spill‐
ages while topping up
If fluid spills onto soil, the environment will be
damaged.
Make sure that no fluid spills while top‐
#
ping up.
* NOTE Damage to the hydraulic system
If you top up too much hydraulic fluid, the
expansion chamber in the hydraulic fluid res‐
ervoir is decreased.
This can damage the hydraulic system.
Never top up too much hydraulic fluid.
#
Have excess hydraulic fluid siphoned
#
off.
Only use hydraulic fluids which have
#
been checked and approved by the
Mercedes-Benz Specification for Oper‐
ating Fluids for the semitrailer hydraulic
system. Using other hydraulic fluids or
mixing other hydraulic fluids can dam‐
age the hydraulic system of the tractor/
semitrailer combination.
Hydraulic fluid reservoir
3
on the right-hand side of the vehicle or combined
with the fuel tank on the left-hand side of the
vehicle as a combination tank.
Check the hydraulic fluid level every day and only
when the vehicle is horizontal and stationary.
Ensure that the control lever in the cab is in
#
the centre position (STOP) .
Ensure that power take-off for the hydraulic
#
pump is disengaged (
/
Only then is the hydraulic system of the trac‐
tor/semitrailer combination depressurised.
Remove cap with integrated vent filter 1.
#
Unscrew and remove filter screen 2.
#
Measure the gap between the hydraulic fluid
#
surface level and the upper edge of the filler
neck and determine the quantity of fluid
used.
Combination tank with fuel tank on the left-
hand side of the vehicle
4
Max. fill level
140 l for 128 l used fluid quantity (usable vol‐
ume)
5
Distance
Approx. 2.3 l used fluid loss for every 10 mm
the surface level lowers
Single tank on the right-hand side of the vehi‐
cle
Driving mode 295
is either a single tank
page 307).
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