2 4 0 Ch e ck ing and filling
When the engine is warm, the leve l may be
slight ly above the "MAX" marking.
The location of the coolant expansion tank
can be seen in the engine compartment illus -
tration ¢
page 234 .
To obtain an accurate read ing, the engi ne
must be sw itched off.
The expans ion tank in your vehicle is equ ipped
with an e lectr ic coolant level sensor.
When the coolant level is too low, the warning
light in the Auto-Check System ¢
page 31 will
blink until you add coo lant and the level has
been restored to no rma l. Even though the re is
an e lect ric coolant level sensor, we st ill rec-
ommend you chec k t he coolan t leve l from
time to time.
Coolant loss
Coolant loss may indicate a leak in the cooling
system. In the event of coolant loss, the cool-
ing system should be inspec t ed immedia t ely
by your author ized Audi dealer.
It is not
enough mere ly 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 overheat ing.
_& WARNING
The cooling system is unde r pressure 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 cove ring the
cap with a large, thick rag.
- Turn the cap slowly and very carefu lly in
a counter-clockw ise direction wh ile ap-
plying light, downward pressure on the
top of the cap .
- To avoid being burned, do not spill ant i-
freeze or coolant on the exhaust system
or hot eng ine parts. Under certai n condi-
t ions, t he ethy lene g lycol in e ngine cool-
ant can cat ch fire .
(D Note
Do not ad d a ny type of radiator leak sea l-
ant to your veh icle's engine coo lant. 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 Limited
War ran ty.
Adding coolant
Be very careful when adding engine coolant.
Befo re you check anyth ing in the eng ine com-
partment,
always read and heed all WARN-
INGS ¢ .&. in Working in the engine compart -
ment on page 232.
.. Turn off the engine .
.. Let the engine cool down.
.. Place a thick rag over the coolant expansion
tank ¢
page 239, fig. 204 a nd carefully turn
the cap counter-clockwise ¢
,&..
.,. Add coo lant.
.. Twist t he cap on aga in
tightly.
Replacement engine coo lant must confo rm to
exact spec ificat ions ¢
page 239, Coolant.
Even in a n emerge ncy, if coola nt add i-
t ive G12++ , G12+ or G12 is
not availa ble, do
not use a d iffe ren t addi ti ve. Use plain water
instead unti l you can get the correct add itive
and can restore the correct ratio . This sho uld
be done as soon as possible .
If you have lost a considerab le amount of
coolant , then you sho uld add cold antifreeze
and cold wate r on ly when the engine is cold.
Always use
new engine coo lant when refilling.
Do not fill coo lant abov e the
"MAX" ma rk. Ex-
cess coo la nt w ill be fo rced out t hrough the
pressure relief valve in t he cap when the en-
gine becomes hot.
_& WARNING
-=
-
- The cooling system is under pressure and
can get very hot. Reduce the risk of ..,.
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