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The location of the coolant expansion tank
can be seen in the engine compartment
illus-
tration
q page 221 .
To obtain an accurate read ing , the eng ine
must be switched off.
The expa nsion tank in you r vehicle is equipped
with an elec t ric coolant level sensor.
When the coolant level is too low, the warning
light in the Auto-Check System
q page 18
will
blink until you add coo lant and the level has
been restored to norma l. Even t hough the re is
an e lect ric coolant level sensor, we st ill rec -
ommend you check the coolant leve l from
time to time .
Coolant loss
Coolant loss may indi cate a leak in the coo ling
sys t em. In the event of coolant loss, the cool-
ing system should be inspected immedia t ely
by your authorized Audi dealer. It is not
enough merely to add coolant.
In a sealed system, losses can occur only if
the boiling point of t he coolant is exceeded as
a result of overheating.
A
WARNING
The cooling system is unde r press ure and
can get very hot. Reduce the risk of sca ld-
ing from hot coolant by following these
steps.
- Turn off the engine and allow it to coo l
down.
- Protect yo ur face, hands and arms from
escaping fluid and steam by covering the
cap with a large, thick rag.
- Turn the cap slowly and very carefu lly in
a counter-clockwise direction wh ile ap-
plying light, downward pressure on the
t op of the cap .
- To avoid being bu rned, do not spill ant i-
freeze or coo lant on the exhaust system
or hot eng ine parts . Unde r certai n condi-
t ions, the ethy lene g lycol in engine cool-
an t ca n catc h fire.
Checkin g and fillin g
22 7
@
Note
Do not ad d any type of radiator leak sea l-
ant to your ve hicle's engine coolant. Add-
ing radiator repa ir fl uid may adverse ly af-
fect the funct ion and performance of your
cooling system and could result in damage
not cove red by your New Vehicle l imit ed
Warranty .
Adding coolant
Be very careful when adding engine coolant.
Before you check anyth ing in the eng ine com -
partment, always read and heed all WARN-
INGS
q
&
in Working in the engine compart -
ment on page 219 .
.,. Turn off the engine.
.,. let the engi ne cool down.
.,. Place a thick rag over the coolant expansion
tank
q page
226,
fig . 187
and carefully turn
the cap counter-clockwise
~
&_.
.,. Add coo la nt.
.,. Twist t he cap o n aga in
tightly.
Replacement engine coo lant must confo rm to
exact spec ificat ions ~
page
226,
Coolant.
We
recommend using on ly coo la nt additive G12 +
+, G13 or in an eme rgency G12+. Do
not
use a
different additive. In an emergency use pla in
water until you can get the correct additive
and can restore the correct ratio . This sho uld
be done as soon as possible.
If you have lost a cons iderab le amount of
coolant , then you sho uld add cold antifreeze
and cold water on ly when the engine is cold.
Always use
new
engine coo la nt w hen refilling.
Do not fill coo lant above t he " MAX" mark. Ex-
cess coola nt w ill be fo rced o ut through t he
pressure relief valve in the cap when the en-
gine becomes hot.
A
WARNING
- The cooling system is under pressure and
can get very hot. Reduce the risk of
..,.
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