Audi A7 Sportback 2014 Owner's Manual page 238

236 Ch e ck ing and filling
• Place a thick rag over the coolant expansion
tank ¢
page 235, fig . 196
and
carefull y
twist the cap counter-clockwise ¢
&_.
• Add coolant mixed in the correct ratio
¢
page 234, Coolant.
• Twist the cap on again
tightly .
Replacement engine coolant must conform to
exact specifications ¢
page 234 , Coolant .
We recommend using only coolant addi-
tive
Gl2++, Gl3
or in an emergency
Gl2 +.
Do
not
use a different additive. In an emergency
use plain water unt il you can get the correct
addit ive and can restore the correct ratio . This
should be done as soon as possible .
If you have lost a considerable amount of
coolant, then you should add cold antifree ze
and cold water only when the eng ine is cold.
Always use
new
engine coolant when refilling.
Do not fill coolant above the "MAX" mark. Ex-
cess coolant will be forced out t hrough the
press ure relief valve in the cap when the en-
gine becomes hot.
A
WARNING
- The cooling system is under press ure and
can get very hot. Reduce the risk of
scalding from hot coolant by following
these steps .
- Turn off the eng ine and allow it to cool
down.
- Protect your face, hands and arms from
escaping fluid and steam by covering
the cap with a large, thick rag.
- Turn t he cap slowly and very carefully
in a counte r-clockwise direct ion while
applying light, downward press ure on
the top of the cap.
- To avoid being burned, do not spill an-
tifreeze or coolant on the exhaust sys-
tem or hot engine parts. Under certa in
conditions, the ethylene glycol in en-
gine coolant can catch fire.
- Antifreeze is poisonous. Always store an-
t ifreeze in its original container and well
out of the reach of children.
- If you drain the coolant, it must be
caught and safely stored in a proper con-
tainer clearly marked "poison".
(D
Note
- Coolant pollutes the environment and
could cause an engine fire. Excess cool-
ant will be forced out through the pres-
sure relief valve in the cap when the en-
gine becomes hot .
- If, in an emergency, only water can be
added, the correct ratio between water
and antifreeze ¢ page 234 must be re-
stored as soon as possible .
®
For the sake of the environment
Drained coolant should not be reused. Al-
ways dispose of used coolant while observ -
ing all environmental regulations .
Radiator fan
The radiator fan switches on automatically by
itself .
An auxiliary electric radiator fan switches on
and off depending on coolant temperature
and othe r vehicle operat ing condit ions.
After you switch the engine off, the auxiliary
fan can continue running for up to 10 minutes
- even wit h the ignition off. It can even switch
on aga in later by itself ¢
A ,
if
- the temper ature of the engine coolant rises
due to the heat build-up from the engine in
the engine compartment, or
- the engine compartment heats up because
the vehicle is parked in intense sunlig ht.
A
WARNING
- To reduce the risk of personal injury nev-
er touch t he radiator fan .
- The auxiliary electric fan is temperat ure
controlled and can switch on suddenly
even when the engine is not running.
- The auxiliary radiator fan switches on au-
tomatically when the engine coolant
reaches a certai n temperature and will ..,.