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
syst 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 lant 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 lant when refilling.
Do not fill coo lant above t he "MAX" mark. Ex-
cess coola nt will 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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