Ch e ck ing and Filling
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 .
Cooling system
Coolant
The engine cooling system is filled with a mixture
of pur ified wate r and coolan t addit ive at the fac-
tory . This coolant must not be not changed.
The coolant level is monito red throug h the . in-
dicator light ~
page 13. Howeve r, we do recom-
mend occasionally checking the coolant level
manually.
If you must add coolant, use a m ixt ure of wat er
and coolant addit ive. Mixing the coolant additive
with distilled wate r is recommen ded .
Coolant additive
The coolant additive is made of ant i-freezi ng and
corros ion protection agents . Only use the follow-
ing coolant add it ives. These additives may be
mixed wit h each other.
Coolant additive
Specification
G13 TL774J
G12++
TL 774 G
The amount of coolant additive that needs to be
mixed wit h wate r depends on the climate where
the vehicle will be operated . If the coolant addi -
tive percentage is too low, the coolant can freeze
and damage the engine.
Coolant Freeze protec-
additive tion
Warm reg ions min . 40% min. -13 °F
max. 45%
(-25
°()
Cold regions
min. 50% max . -40 °F
max. 55%
(-40 °()
0 Note
- Before the start of winter, have your author-
ized Audi dealer or authorized Audi Service
Facility check if the coolant additive in you r
166
vehicle matches t he percentage app ropriate
for the climate . This is especially important
when driving in colder climates.
- If the app ropriate coolant additive is not
available in an eme rgency, do not add any
other additive. You could damage the en-
gine. If this happens, only use water and re-
store the correct mixture ratio with t he
specified coolant add itive as soo n as poss i-
ble .
- Only ref ill with new coolant.
- Radiator sealant must not be mixed with
the coolant.
· Adding coolant
Fig. 14 3 Engine compartment: coolant expansion ta nk
cover
Observe the safety precautions ~ .& in Working
in the engine compartment on page 159 .
Checking the engine coolant level
.. Park the vehicle on a level surface .
.. Switch the ignit ion off.
.. Read the coolant level on the coolant expansion
t ank ~
page 162, fig. 140. The coolant level
must be betwee n the mar kings when the en-
gine in cold. When t he engine is warm it can be
slightly above the upper mar king.
Adding coolant
Requirement: t here must be a residua l amount of
coolan t in the expansion ta nk ~ (}).
.,. Let the engi ne cool down .
.. Place a clot h over the coolant expans ion tank
cap and unscrew the cap counte rclockwise
~.&-
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