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M
N
ci
u..
co
,....,
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1.1"1
N
1.1"1
,....,
specia lly conditio
ned
water
and
the manu factu r-
er's
glycol-basedcoolant
additive
Gl3 antifreeze
with anticorrosion
add
itives
(50%
for USA mod-
els; 60%
for
Canadian models). This mixture both
assures the
necessary
frost
protection
and
pro-
tects meta
l
components in the engine's cooling
system from corrosion and scaling
.
It
also raises
the boiling point of the coolant.
Do not reduce
the concentration
of
the coolant in
the
summer by
adding
plain water
.
The propor-
tion of coolant addit
ive must
be at least 50
%
but not
more
th an 60
% to maintain antifreeze
protection and cooling efficiency. If
t
he coolant
frost protection is too low, the coolant could
freeze and damage the vehicle heating and en-
gine cooling system.
For yea
r-round
driving, antifreeze is added at the
factory
for
temperatures
down
to:
-
-31°F(-35°C)USA
-
- 40 °F
(
- 40 °C) Canada.
If you must add coolant,
use
a mixture of water
and coolant addit
ive. Mixing the coolant
additive
with distilled
water
is recommended.
A
WARNING
Before you check
anything
in the engine com-
partment, always read and heed all WARN-
INGS
¢
&.
in Working in the engine compart-
ment on page 195.
(D
Note
-
Before winter sets in, have the
coolant
checked to see if the coolant addit ive
in
your
vehicle is sufficient to meet the climate con-
dit ions. This is especially important if you
live in a region where the
wint
er is extreme-
ly cold.
If
necessary, increase
t
he proport ion
of coolant add itive to 60%.
-
When adding coolant additive to
your cool-
ing system, remember:
-
We
recommend
using only
coolant
addi-
tive Gl2++ or Gl3
for
your vehicle. This
coolant additive is available at authorized
Audi dea lers. Other types of ant ifreeze can
significant ly reduce corrosion protection.
Checking
and Fillin
g
The resulting corrosion can cause a loss
of
coolant and serious engine damage.
-
Do not add any type of rad iator leak sealan
t
to your vehicle's engine coolant. Adding ra-
diator repai
r
fluid may adverse ly affect the
function
and
performance of your cooling
system
and could
result
in
damage not cov-
ered by your New Vehicle
Limited
Warranty.
Checking the engine coolant level
The
engine coolant level can be
checked with a
quick glance.
Fig.
1
75
Engine
com
partment:
Cover
on
the
coo lant
ex-
pa nsion tank
..
Before
you
check anything in
the engine
com-
partment,
always read and heed all WARN-
INGS
¢
A
in
Working in the engine
compart-
ment on page 195.
..
Park your vehicle on a level su rface.
..
Turn off the ignition
.
..
Read the
engine
coolant level from the coolant
expansion
tan
k
¢fig
.
175,
¢page
197,
fig.
172
. Wit
h a cold engine, the coolant
level
should be between the
"MIN"
and "MAX" ma rk-
ings.
When the eng ine
is warm,
the level may
be slightly
above
the
"MAX" marking.
The location of the coolant expansion
tank
can be
seen
in
the engine
compartment illustration
¢
page
197.
To obtain an accurate reading, the engine must
be switched off.
The expansion tank in your vehicle is eq uipped
with an electric coolant level senso r.
When the coolant
level
is too low, the warning
light in the Auto-Check System¢ page 17 will
201
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