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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 fo llow-
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%
m in. -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
fo r 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. 1 86
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
wa rm 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 mo re coolant if necessary.
.,. Close the cap securely .
Coolant loss usually indicates t here is a lea k. Im-
med iate ly dr ive 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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