Cooling System - Audi A5 Owner's Manual

document_0900452a8179700c.book Seite 235 Donnerstag, 22. März 2007 10:19 10
from oil filler opening ⇒ page 234,

– Unscrew cap
fig. 226.
– Carefully put in the specified grade of oil ⇒ page 295
0.5 litres at a time.
– After two minutes check the oil level once again
⇒ page 234.
– If the oil level is too low, add more engine oil.
– Replace the oil filler cap carefully and push the dipstick
all the way in.
WARNING
Ensure that no oil comes into contact with hot engine compo-
nents when topping up: this could cause a fire.
Wash your skin thoroughly if it comes into contact with engine
oil.
Caution
The oil level must never be above area
damage to the catalytic converter or to the engine. Contact a quali-
fied workshop to extract the engine oil if necessary.
No additives should be used with engine oil. Any damage caused
by the use of such additives would not be covered by the factory
warranty.
For the sake of the environment
Never pour oil down drains or into the ground.
Always observe statutory requirements when disposing of
empty oil canisters.
Controls

Cooling system

Coolant
The purpose of the coolant is to carry heat away from the
engine. The correct amount of anti-freeze is important to
prevent the cooling system from freezing in winter.
The cooling system is filled for life at the factory, so the coolant does
not need to be changed. The coolant consists of a mixture of water
and anti-freeze additive G12+. This is a glycol-based anti-freeze with
anti-corrosion additives.
Anti-freeze additive
The amount of anti-freeze additive required depends on the temper-
atures to be expected in the winter season. If the anti-freeze concen-
tration is too low the coolant can freeze, resulting in failure of the
cooling system and heater.
The cooling system is filled at the factory with the correct amount of
anti-freeze for the country concerned.
In most cases the mixture consists of 60% water and 40% additive.
This mixture gives the necessary antifreeze protection down to –
A
a , as this may result in
25 °C and protects the alloy parts of the cooling system against
corrosion. It also prevents scaling and raises the boiling point of the
coolant.
Countries with warm climate
The coolant concentration must not be reduced by adding plain
water, even in the summer or in warm climates. The concentration
of the anti-freeze additive must always be at least 40%.
Countries with cold climate
If greater anti-freeze protection is required in very cold climates, the
proportion of the anti-freeze additive G12+ can be increased. A
concentration of 60% offers protection down to about -40 °C. The
concentration of the antifreeze additive must not be more than 60%,
Safety Driving tips General maintenance
Checking and topping up fluids
Self-help Technical data
235