wooded areas, into open streams or
down sewage drains .
- Recycle used engine oil by taking it to a
used engine oil collection facility in your
area, or contact a service station.
Engine cooling system
Coolant
The engine coolant performs two functions: it
keeps the engine from overheating and it pro-
tects the engine from freezing in the winter .
The cooling system is sealed and generally re-
quires little attention .
The cooling system has been filled at the fac-
tory with a permanent coolant which does not
need to be changed . The coolan t consis t s of a
mixture of water and the manufacturer 's gly -
col-basedcoolant additive G12 ++ antifreeze
with anticorrosion additives (50% for USA
models; 60% for Canad ian models). This mix-
ture both assures the necessary frost protec-
tion and protects metal components in the
engine 's cooling system from corrosion and
scaling. It also raises th e boiling point of the
coolant.
Do not reduce the concentration of the coo l-
ant in the summer by adding plain water .
The
proportion of coolant additive must be at
least 50% but not more than 60%
to main -
tain antifree ze protection and cooling efficien-
cy. If the coolant frost protection is too low,
the coolant could freeze and damage the veh i-
cle heating and eng ine cooling system .
For year-round driving, an t ifree ze is added at
the factory for temperatures down to:
- - 31 °F ( - 3 5 °C) USA
- - 40 °F ( - 40 °C) Canada.
You can mix the G12 ++ coolant addit ive with
other additives (G12+ or G12) . Always check
with your author ized Audi dealer.
& WARNING
Before yo u check anything in the engine
compartment, always read and heed all
-
Checkin g and fillin g 189
WARNINGS c:::> .& in Working in the engine
compartment on page 182.
(D Note
- Before winter sets in, have the coolant
checked to see if the coolant additive in
your vehicle is sufficient to meet the cli-
mate conditions. This is especially impor-
tant if you live in a region where the win-
ter is extreme ly cold . If necessary, in-
crease the proportion of coolant add itive
to 60% .
- Whe n adding coolant additive to your
cooling system, remember :
- We recommend using on ly coo lant ad-
ditive G12 ++ (check the labe l) for your
vehicle . This coolant additive is avai la-
ble at authorized Audi dealers. Other
types of ant ifreeze can significantly re-
duce corrosion protection . The result-
ing corrosion can cause a loss of cool -
ant and ser ious eng ine damage.
- Do not add any type of rad iator leak seal -
ant to your vehicle 's engine coolant .
Add ing radiator repair flu id may adverse-
ly affect the function and performance of
your cooling system and could resu lt in
damage not covered by your New Vehicle
Limited Warranty .
Checking the engine coolant level
The engine coolant level can be checked with
a quick glance.
Fig. 14S Engine compart ment : coolant expan sion t ank Ill>
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