Ch e ck ing and Filling
The coolant level is monitored through the . in-
dicator light ¢
page 14. However, we do recom-
mend occasionally checking the coolant level
manually.
If you must add coolant, use a mixture of water
and coolant additive. Mixing the coolant additive
with distilled water is recommended.
Coolant additiv e
The coolan t addi tive is made of anti-freezi ng and
corros ion protection agents. Only use the follow-
ing coolant additives . These additives may be
mixed with each other.
Coolant additive Specification
Gl3
TL 774)
Gl2++
TL 774 G
The amount of coolant add itive that needs to be
mixed with water 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 °C)
Cold regions min. 50% max. -40 °F
max. 55%
(-40 °C)
([) Note
- Before the start of winter, have your author-
ized Audi dealer or authorized Audi Service
Facility check if the coolant additive in your
vehicle matches the percentage approp riate
for the climat e. This is especially important
when driving in colder climates .
- If the approp riate coolant additive is not
available in an emergen cy, do not add any
other additive. You could damage t he en -
gine. If this happens, only use water and re-
store the correct mixture ratio with the
spec ified coolant additive as soon as possi-
ble.
- Only refill with new coolant.
- Radiator sealant must not be mixed with
the coolant .
206
· Adding coolant
Fig. 186 Engine compartment : coolant expansion tank
cover
-
N
-
~
~
Observe the safety precautions ~ .&. in Working
in the engine compartment on page 199.
Checking the engin e coolant level
Park the vehicle on a level surface.
.,. Switch the ignit ion off.
.,. Read the coolant level on the coolant expansion
tank ¢
page 202, fig. 184. The coolant level
must be betwee n the MIN and MAX mark ings
when the engine in cold. When t he engine is
warm it can be slightly above the MAX marking.
Adding coolant
Requirement: there must be a residual amount of
coolant in the expansion tank ¢ (D .
.,. Let the engine cool down .
.,. Place a cloth over the coolant expansion tank
cap and unscrew the cap counterclockw ise
¢ .8_.
.,. Add coolant m ixed in the correct rat io
¢ page 205 up to t he MAX mar king.
.,. Make sure that the f luid level remains stab le.
Add more coolant if necessary.
.,. Close the cap securely .
Coolant loss usually indicates t here is a lea k. Im-
med iate ly drive your vehicle to an author ized
Audi dealer or author ized Audi Service Facility
and have the cooling system inspected . If the
cooling system is not leaking, a loss can come
from the coolant boiling through overheating
and being pushed out of the cooling system.
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