Note:
As the concentration of the corrosion- and anti-
freeze protection fluid deteriorates long-term, it
must be checked yearly using a commercial an-
tifreeze tester. If the concentration is too low, no
matter at which service interval, the coolant
must be replaced as described in Chapter 5.6.1.
Filling the cooling system
Work on the cooling system must
not be performed while the engine
is warm - risk of scalding !
The cooling system is pressurized.
13
– Open cap
1
.
– Pour in coolant until the level reaches the
MAX
mark on the expansion tank.
– Tighten cap
1
by hand.
– After the engine has warmed up, check coolant
level again. When the engine is at a standstill
and has cooled down, the coolant level must
be visible between the tank’s
MIN
and
MAX
marks; if the engine is warm, the level may be
slightly above the
MAX
mark.
– Check cooling system for leakage; if
necessary, re-tighten hose clamps.
Add coolant
While the engine is warm, the cap of
the expansion tank must not be opened
Risk of scalding. The cooling system is pres-
surized.
– First stop the engine and allow it to cool down.
Then put a piece of cloth over cap
1
of the ex-
pansion tank and open cap carefully (Fig. 13).
– Add coolant until the level is between the
MIN
and the
MAX
mark (Fig. 13).
– Tighten cap
1
by hand.
16
