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specia lly conditioned water and the man ufactur-
er's
glycol-basedcoo lant additive Gl3 antifreeze
with anticorrosion additives (50% for USA mod-
els;
60%
for
Canadian models). This m ixture
both
assures the
necessary frost protection
and
protects metal
components in
the engine's cool-
ing 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
leas
t
50°/4
but not more th an 60
% to maintain antifreeze
protection and cooling
efficiency.
If the coolant
frost protec
t
ion 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
Q
&.
in Working in the engine compart-
ment on page 191.
(D
Note
-
Before winter sets in, have the coolant
checked to see if the coolant additive in your
vehicle is sufficient to meet the climate con-
dit ions. This is especially important if you
live in a reg ion where the winte
r
is ext reme-
ly cold. If necessary, increase
t
he proport
ion
of coolant add itive to 60%.
-
When addi ng coolant addit ive to you
r
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. Othe
r
types of antifreeze can
significant ly reduce cor rosion protection
.
Ch
e
c
k
ing
an
d Filling
The resulting corrosion can cause a loss of
coolant and serious engine damage.
-
Do not add any type of radiator lea
k
sealant
to your vehicle's engine coolant. Adding ra-
diator repair fluid may adversely affect the
function
and
performance of your cooling
system and
could
resu
lt 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
63
Engine
com
pa
rtment: Cover
on
the
coo
lant
ex-
pans ion tank
..
Before
you
check
anything in
the
eng ine
com-
partment,
always read and heed all
WARN-
INGS
q
..&.
in
Working in the engine
compart-
ment on page 191.
..
Park your vehicle on a
level
surface
.
..
Turn off the ignit
ion
.
..
Read the eng ine coolan
t
level from the coolant
expansion tank
qfig
.
163,
Qpage
193,
fig. 160
.
With a cold
engine,
the coolant level
should be between the
"MIN"
and "MAX" mark-
ings.
When the engine
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
q
page
193.
To obtain an accurate reading, the
engine
must
be switched off.
The expansion ta nk in your veh icle 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
Q
page 17
will
197
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