Volkswagen Jetta VS5 2023 Owner's Manual page 176

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In order to obtain the optimum anti-corrosion ef-
fect, it is recommended to fill the cooling system
with our original coolant
WARNING
Inadequate frost protection of the engine cool-
ing system can lead to engine failure, which
can lead to injury or death.
● Make sure that the coolant additive is always
adapted corresponding to the ambient tem-
perature.
● Coolant can freeze at extremely cold outside
temperatures, causing the vehicle to break
down. This can lead to the heating no longer
working in the vehicle. Vehicle occupants
with inadequate winter clothing could freeze
to death.
NOTICE
When adding coolant additives, never mix genu-
ine coolant additives with other coolant additives
that have not been approved by Volkswagen,
otherwise, the engine and its cooling system may
be damaged.
● If the liquid in the coolant expansion tank is
not violet but brown, the suitable coolant has
been mixed with another unsuitable coolant.
In this case, the coolant must be replaced, oth-
erwise, it may seriously deteriorate the engine
performance and damage the engine.
Coolant and coolant additives can pollute
the environment. Spilt service fluids must
be collected and disposed of properly and with
respect for the environment.
174
Owner's manual
Checking the coolant level and
refilling coolant
.
at the start of the chapter on page 173.
Fig. 138 In the engine compartment: markings on
the coolant expansion tank (illustration).
Fig. 139 In the engine compartment: coolant ex-
pansion tank cap (illustration)
If the engine coolant level is too low, the warning
lamp will flash.
Preparations
– Park the vehicle on a firm and level surface.
– Allow the engine to cool down
– Open the bonnet
– The coolant expansion tank is identified by the
Please refer to
and
on page 164 and
page 164.
symbol  on the cap
Fig.
.
139.

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