engine overheat AUDI A4 2013 User Guide

The location of the coolant expansion tank
can be seen in the engine compartment illus­
tration
q page 221 .
To obtain an accurate read ing , the eng ine
must be switched off .
The expa nsion tank in you r vehicle is equipped
with an elec tric coolant level sensor.
When the coolant level is too low, the warning
light in the Auto-Check System
q page 18 wi ll
b lin k until you add coo lant and the level has
been restored to norma l. Even t hough the re is
an e lec tric coolant level sensor, we s till rec ­
ommend you check the coolant leve l from
time to time .
Coolant loss
Coolant loss may indi cate a leak in the coo ling
sys tem. In the event of coolant loss, the cool­
ing system should be inspected immedia tely
by your authorized A udi dealer. It is not
enough merely to add coolant.
I n a
s ealed system, losses can occur only if
the boiling point of the coolant is exceeded as
a result of overheating.
A WARNING
The cooling system is unde r press ure and
can get ve ry hot. Reduce the risk of sca ld­
ing from hot coolant by following these
steps.
- Turn off the engine and allow it to coo l
down.
- Protect yo ur face, hands and arms from
escaping fluid and steam by covering the
cap with a large, thick rag.
- Turn the cap slowly and very carefu lly in
a counter-clockwise direction wh ile ap­
plying light, downward pressure on the
t op of the cap .
- To avoid being bu rned, do not spill ant i­
freeze or coo lant on the exhaust system
o r hot eng ine parts . Unde r certai n condi­
t ions, the ethy lene g lycol in engine cool­
an t ca n catc h fire.
Checkin g and fillin g 22 7
@ Note
Do not ad d any type of radiator leak sea l­
ant to your ve hicle's engine coolant. Add ­
i ng radiator repa ir flui d may adverse ly af­
fect the funct ion and performance of your
cooling system and could result in damage not cove red by your New Vehicle l imi ted
Warranty .
Adding coolant
Be very careful when adding engine coolant.
Before you check anyth ing in the eng ine com ­
partment,
always read and heed all WARN­
INGS q & in Working in the engine compart ­
ment on page 219 .
.,. Turn off the engine.
.,. let the engi ne cool down.
.,. Place a thick rag over the coolant expansion
tank
q page 226, fig . 187 and carefully turn
the cap counter-clockwise
~ &_ .
.,. Add coo la nt.
.,. Twist the cap o n aga in
tightly.
Rep lacement engine coo lant must confo rm to
exact specificat ions ~
page 226, Coolant. We
recommend using on ly coo lant additive G 12+
+ , G 13 or in an eme rgency G12+. Do
not use a
different additive. In an emergency use pla in
water until you can get the correct additive
and can restore the correct ratio . This sho uld
be done as soon as possible.
If you have los t a cons iderab le amount o f
coolant , then you sho uld add cold antifreeze
and co ld water on ly when the engine is cold.
A lw ays use
new engine coo lant w hen refilling.
Do not f ill coo lant above t he "MAX" mark. Ex­
cess coola nt w ill be fo rced o ut through t he
pressure relief valve in the cap when the en­
gine becomes hot.
A WARNING
- The cooling system is under pressure and
can get very hot. Reduce the risk of ..,.
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~ Unscrew the valve stem from the spare tire.
~ Screw the tire filler hose from the compres­
sor firmly onto the valve of the spare tire.
~ Insert the plug from the compressor into a
socket of the vehicle¢
page 64.
~ Switch the compressor on .
~ Let the compressor run until the value
specified on the tire pressure label is
reached
¢ page 238, fig. 192. Switch the
compressor off after running for 12 minutes
at the most -danger of overheating!
A WARNING
The compressor and the tire filler hose can
become extremely hot while they are run­
ning -danger of burns!
(D Note
Switch the compressor off after running
for 12 minutes at the most -danger of
overheating! Allow the compressor to cool
down for a few minutes before you use it
again.
Changing a wheel
Before changing a wheel
Observe the following precautions for your
own and your passenger's safety when chang­
ing a wheel .
~ After you experience a tire failure, pull the
car well away from moving traffic and try to
reach
level ground before you stop¢ L!)..
~ All passengers should leave the car and
move to a safe location (for instance, behind
the guardrail) ¢
A.
~ Engage the parking brake to prevent your
vehicle from rolling unintentionally ¢
A.
~ Shift into 1st gear on vehicles with manual
transmission, or move the
selector lever to
the P position
on vehicles with automatic
transmission .
~ If you are towing a trailer: unhitch the trail­
er from your vehicle.
~ Take the jack¢ page 256 and the spare tire
¢ page 257 out of the luggage compart­
ment.
What do I do now? 259
A WARNING
You or your passengers could be injured
while changing a wheel if you do not fol­
low these safety precautions:
- If you have a flat tire, move a safe dis­
tance off the road. Turn off the engine,
turn the emergency flashers on and use
other warning devices to alert other mo­
torists.
- Make sure that passengers wait in a safe
place away from the vehicle and well
away from the road and traffic.
- To help prevent the vehicle from moving
suddenly and possibly slipping off the
jack, always fully set the parking brake
and block the wheel diagonally opposite
the wheel being changed with the fold­
ing chocks or other objects. When one
front wheel is lifted off the ground, plac­ ing the Automatic Transmission in "P"
(Park) will
not prevent the vehicle from
moving .
- Before you change a wheel, be sure the
ground is level and firm. If necessary,
use a sturdy board under the jack.
- Always store the vehicle tool kit, the
jack* and the replaced tire in the luggage compartment
¢page 133.
(D Note
If you are changing the wheel on a steep
incline, use a rock or similar object to
block the opposite wheel to prevent the
vehicle from moving.
(D Tips
Obey all laws.
Changing a wheel
When you change a wheel , follow these­
quence described below step-by-step and in
exactly that order.
l. Remove the decorative wheel cover* or
-
the wheel bolt caps*. For more details see..,.
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