00
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~
Add coolant mixed in the correct ratio
¢ page 166 up to the upper marking.
~
Make sure that the fluid level rema ins stable.
Add more coolant if necessary.
~
Close the cap securely.
Coolant loss usually indicates there is a leak. Im-
mediately drive your vehicle to an authorized
Audi dealer or authori zed 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 be ing pushed out of the cooling system.
.&, WARNING
The cool ing system is pressu rized and can be-
come very hot. To reduce the risk of burns
from hot coolant :
- Do not open the coo lant expansion tank cap
when the engine is hot. This increases the
risk of burns.
- Stop the engine and allow it to cool.
- Protect your face, hands and arms from es -
caping coolant and steam by covering t he
coolant tank cap with a large, thick cloth .
- Turn the coo lant tank cap counterclo ckwise
slowly and keep light pressu re on the cap .
- To reduce the risk of burns , do not allow any
antifreeze or coolant to drip onto the ex-
haust system or hot engine components.
The ethylene glycol in engine coolant can
catch fire under certain circumstances .
- The coo lant add itive and the coolant can be
dangerous to your health . For this reason,
keep the coolant in the original container
and away from children. There is a risk of
poisoning.
- When working in the engine compartment,
remember that the radiator fan can switch
on even if the ignition is switched off, which
increases the risk of injury .
Do not add coolant if the expansion tank is
empty. Air could enter the cooling system and
damage the engine. If this is the case, do not
cont inue driving . See an authorized Audi deal -
Ch e ck ing an d Filling
er or authorized Aud i Service Facility for assis -
tance .
- Before the start of winter, have your author-
ized Aud i dea ler or a uthorized Audi Serv ice
Facility check if the coolant additive in your
vehicle matches the percentage appropriate
for the climate. This is especially important
when driving in colder climates.
- If the appropr iate coo lant add itive is not
availab le in an emergency, do not add any
other additive . You could damage the en-
gine. If this happens, only use water and re-
store the correct m ixtu re ratio with the
specified coolant add it ive as soo n as poss i-
ble .
- Only refill with new coolant.
- Radiator sealant must not be mixed with
the coolant .
Radiator fan
The radiator fan switches on automatically by it-
self.
An auxiliary electric radiator fan switches on and
off depend ing on coolant temperature and other
vehicle operating conditions.
After you switch the engine off, the auxiliary fan
ca n continue running for up to 10 m inutes - even
with the ignition off . It can even switch on aga in
later by itself ¢ .&, if
- the temperature of the engine coolant rises due
to t he heat build-up from the engine in the en-
gine compartment, or
- the engine compartment heats up bec a use the
veh icle is parked in int ense sunlight.
.&, WARNING
- -
- To reduce the risk of personal injury never
touch the radiator fan .
- The auxiliary e lectr ic fan is temperature
controlled and can switch on s uddenly even
when the engine is not runn ing .
- The auxiliary radiator fan sw itches on auto -
mat ica lly when the eng ine coolant reaches a
certa in temperature and will continue to run
until the coolant t emperature d rops .
167
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