204 Che cking and filling
Checking the engine coolant level
The engine coolant level can be checked with
a quick glance .
Fig. 162 Engine compartme nt: coolant expansio n ta nk
Before you check anything in the eng ine com-
partment,
always read and heed all WARN-
INGS ¢ &. in Working in the engine compart-
ment on page 194.
.. Park your vehicle on a level surface.
.. Turn
off the ignition.
.. Read the eng ine coolant level from the
coolant expansion tank <=>
fig. 162 . With a
cold eng ine, the coolant level should be be-
tween the "min" and "max" markings . When
the engine is warm, the level may be slightly
above the "max" marking.
The location of the coolant expansion tank
can be seen in the engine compartment illus-
tration
i:> page 196.
To obtain an accurate read ing, the engine
must be switched
off.
The expansion tank in your vehicle is equipped
with an electric coolant level sensor .
When the coolant level is too low, the warning
light in the Auto-Check System
c> page 17 will
blink until you add coolant and the level has
been restored to norma l. Even though there is
an electric coolant level sensor, we still rec-
ommend you check the coolant level 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 inspected immediately
by your authorized Audi dea ler.
It is not
enough merely to add coolant .
In a
se aled system, losses can occur only if
the boiling point of the coolant is exceeded as
a result of overheating.
(D Note
Do not add any type of radiator leak sea l-
ant t o your vehicle's engine coolant . Add-
ing radiator repair fluid may adverse ly af-
fect the funct ion and performance of your
cooling system and could result in damage
not covered by your New Vehicle Limited
Warranty .
Adding coolant
Be very careful when adding engine coolant.
Before you check anything in the eng ine com -
partment,
always read and heed all WARN-
INGS c::> A in Working in the engine compart -
ment on page 194 .
.. Turn off the engine .
.. Let the engine cool down.
.. Place a thick rag over the coolant expansion
tank
c::>page 204, fig. 162 and carefully
twist the cap counter-clockwise c::> A .
.. Add coolant .
.. Twist the cap on aga in
tightly .
Replacement engine coolant must conform to
exact spec ificat ions
c::> page 203, Coolant.
Even in an emergency, if coolant addi-
tive G12++. G12+ or G12 is not available, do
not use a different addit ive. Use plain water
instead until you can get the correct add itive
and can restore the correct ratio. This shou ld
be done as soon as possible .
If you have lost a considerab le amou nt of
coolant, then you sho uld add cold ant ifree ze
and cold wate r only when the engine is cold.
Always use
new engine coolant when refilling .
Do not fill coolant above the "MAX" mark. Ex-
cess coolant will be forced out through the
pressure relief valve in the cap when the en-
gine becomes hot .
Iii>
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