Audi A7 2023 Owner's Manual page 249

Checking and Filling
following coolant additives mixed with distilled
water.
Gl12evo TL774L
The amount of coolant additive that needs to be
mixed with water depends on the climate where
the vehicle will be operated. If the coolant addi-
tive percentage is too low, the coolant can freeze
and damage the engine.
Warm min. 40% min. -13 °F
regions max. 45% (25 °C)
Cold min. 50% max. -40 °F
regions max. 55% (-40 °C)
— Before the start of winter, have an author-
ized Audi dealer or authorized Audi Service
Facility check if the coolant additive in your
vehicle matches the percentage appropriate
for the climate. This is especially important
when driving in colder climates.
— If the G1 2evo coolant additive is not availa-
ble in an emergency, do not add any other
additive. You could damage the engine. If
this happens, only use distilled water and
restore the correct mixture ratio with the
specified coolant additive as soon as possi-
ble.
— Only refill with new coolant.
— Radiator sealant must not be mixed with
the coolant.
— You can continue driving if the permitted
G1 2evo coolant additive was not added.
However, go to an authorized Audi dealer or
authorized Audi Service Facility immediately
to have the coolant replaced to reduce the
risk of engine damage.
— Due to the risk of engine damage, the cool-
ing system should only be refilled by an au-
thorized Audi dealer or authorized Audi
Service Facility. An authorized Audi dealer or
authorized Audi Service Facility can also pro-
vide you with important information about
the recommended coolant additive.
Fig. 152. Engine compartment - Coolant expansion tank
(diagram): @ cover with release button; @ markings
Observe the safety precautions page 239, Gen-
eral information.
Checking the coolant level
» Park the vehicle on a level surface.
» Switch the ignition off.
» Open the hood = page 240.
The coolant expansion tank for some engines is
located in the water drip tray under a cover. Slide
the cover that is located below the windshield
wiper on the front passenger's side toward the
windshield and remove the cover.
» Check the coolant level in the coolant expan-
sion tank © page 242, fig. 149 using the outer
markings @) © fig. 152. The coolant level must
be between the markings @) when the engine is
cold. When the engine is warm it can be slight-
ly above the upper marking.
» When you add coolant to the expansion tank,
please refer to > page 246, Cooling system.
Adding coolant
Requirement: there must be a residual amount of
coolant in the expansion tank >@).
If you must add coolant, use a mixture of water
and coolant additive. Audi recommends mixing
the coolant additive with distilled water.
» Allow the engine to cool.
» Place a large, thick towel on the coolant expan-
sion tank cap.
» Push the release button (0) > fig. 152 on the
cap and carefully turn it to the left until you
feel resistance > /\.
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