2018 AUDI A8 coolant reservoir

Cockpit overv ie w
- If the brake system indicator light does not
t u rn off or it t urns on while driv ing, the
brake fluid level in the reservoir is too low,
and this increases the risk of an acc ident.
Stop the vehicle a nd do not cont inue dr iv­
ing . See an author ized Audi dealer or au­
t h orized Aud i Serv ice Faci lity fo r ass ista nce.
- If the brake system ind icator light turns on
toget he r with the ABS and ESC ind icator
l ights, the ABS/ ESC regulat ing func tion may
be m alfu nctioning. Fu nctions t hat stabilize
the vehi cle are no longer ava ilable . This
cou ld cause the ve hicle to swerve, whic h in ­
creases the risk that t he ve hicle wi ll slide.
Do not continue driving. See an author ized
Audi dealer or author ized Audi Service Fac ili­
ty for assistance .
PARK/(®) Electromechanical parking brake
If the -(USA models) / . (Canada models)
i n dicator light tu rns on , the park ing brake was
set .
-(USA models ) /. (Canada models ) Cau·
tion : Vehicle parked too stee p
lfthe indicator light blinks and the message ap­
pears, the re is not enough brak ing power to se­
cure the vehicle . The brakes have overhea ted. The
ve hicle could roll away even on a small incline .
-(USA models) / . (Canada models) P ress
b rake pedal to release parking b rake
To re lease the parking brake, press the brake
pedal and press
the ~ button at the same time
or start driv ing with hill start ass ist
c> page 82 .
Ill Parking brake!
There is a malfunction in the park ing brake . Dr ive
to a n author ized Audi dealer or author ized A udi
Serv ice Faci lity immediately to have t he malfunc­
tion corrected.
(D Tips
For add it io na l info rmation on the pa rk ing
brake, seer:!)
page 81.
20
_ L Cooling system
• Turn off engine and ch eck coolant l evel
The coolant level is too low .
Do not continue dr iving and switch t he engine
off. Check the coolant level
c> page 2 77 .
- If the coo lant level is too low, add coolant
r:!) page 2 78. Only continue driving once the in­
dicator light turns off.
• Coolant temperature too high! Ple ase let en­
gine run with vehicle stationar y
Let the engine ru n at idle fo r a few mi nutes to
cool off, until t he ind icator lig ht tur ns off .
-If the ind icator light does not turn off, do not
cont inue driving the veh icle . See an author ized
Aud i dea le r or aut horized Audi Serv ice Facility
for assis tance.
.&_ WARNING
- N ever ope n the hood if you ca n see or he ar
steam or coo la nt escaping from t he engine
compa rtment. This increases the risk of
burns. Wait until you no longer see o r hear
steam or coolant escaping.
- The engine compartment in any vehicle can
be a dange rous a rea. Stop the engine and
allow it to cool before working i n the engine
compa rtment. Always follow the informa­
tion fo und in
c> page 272.
@ Note
Do not continue driv ing if the . indicator
li ght turns on as this increases the risk of en­
g ine damage.
~ Safety belt
The . indicator light stays on unt il the dr iver 's
and front passenge r's safety belts are faste ned .
Above a certa in speed, the re will a lso be a war n­
i ng tone.
© Tips
Fo r additional info rmat ion on safety belts,
see c>page219.

Checking and Filling
Cl osing the ho od
~ Push the hood down until you override the
force of the strut .
~ Let the hood fall light ly into the latch. Do not
press it in.
c::> .&_ .
A WARNING
-Never open the hood when there is steam or
coolant escaping from the engine compart­
ment, because there is a risk that you could
be burned. Wait until no steam or coolant is
escaping.
Engine compartment overview
The most important check points .
-For safety reasons, the hood must always be
closed securely while driv ing. Because of
this, always check the hood after closing it
to make sure it is latched correctly . The
hood is latched if the front corners cannot
be lifted.
-If you notice that the hood is not latched
while you are driving, stop immed iate ly and
close
it, because d riving when the hood is
not latched increases the r is k of an accident.
Fig. 258 Typical locatio n of the rese rvoir and the engi ne o il fille r open ing
(D Washer fluid reservoir (Q) c::> page 281
@ J ump start point(-) with hex head screw
c::> page 280, c::> page 32 7
® Jump start point(+) under a cover
c::> page 280, c::> page 32 7
@ Engine oil label * w ith VW standard
c::> page 2 75
274
® Engine oil filler opening ( page 2 76
@ Brake fl uid reservo ir ((0)) c::> page 2 79
(J) Coolant reservoir (-L) c::> page 2 78
The engine oil filling opening (item @) may be
l ocated in a different area depending on the en-
gine version.
.,.

lL
_& WARNING
-The cooling system is under pressure. Do
not open the coolant expansion tank cap
when the engine is hot. This increases the
risk of burns .
- The coolant additive and the coolant can be dangerous to your health. For this reason,
keep the coolant in the original container
and away from children. There is a risk of
poisoning.
- When working in the engine compartment,
remember that the radiator fan can switch
on even if the ignition is switched off, which
increases the risk of injury.
CD Note
Do not add coolant if the expansion tank is
empty. Air could enter the cooling system and
damage the engine. If this is the case, do not
continue driving. See an authorized Audi deal­
er or authorized Audi Service Facility for assis­
tance.
Brake fluid
N N
-N
" co IX)
Fig. 261 Engine compartment: cap on brake flu id reservoir
Observe the safety precautions ~&. in Working
in the engine compartment on page 2
72.
Checking the brake fluid level
.. Read the brake fluid level on the brake fluid
reservoir
~ page 274, fig. 258. The brake fluid
level must be between the MIN and MAX mark­
ings~&. -
~ The brake fluid level is monitored automatically .
...... N ...... 0 0 :c ' Checking and Filling
Changing the brake fluid
Have the brake fluid changed regularly by an au­
thorized Audi dealer or authorized Audi Service
Facility.
_& WARNING
-
- If the brake fluid level is below the MIN
marking, it can impair the braking effect
and driving safety, which increase the risk of
an accident . Do not continue driving . See an
authorized Audi dealer or authorized Audi
Service Facility for assistance.
- If the brake fluid is old, bubbles may form
in the brake system during heavy braking.
This would impair braking performance and
driving safety, which increases the risk of an
accident.
- To ensure the brake system functions cor­
rectly, only use brake fluids that comply
with VW standard 50114 or FMVSS-116 DOT 4.
CD Note
- If the brake fluid level is above the MAX
marking, brake fluid may leak out over the
edge of the reservoir and result in damage
to the vehicle.
- Do not get any brake fluid on the vehicle
paint, because it will corrode the paint.
Battery
General warnings about batteries
Because of the complex power supply, all work
on batteries such as disconnecting, replacing,
etc., should
only be performed by an authorized
Audi dealer or authorized Audi Service Facility
~ .&. .
The term "vehicle battery" refers to the 12 Volt
battery in your vehicle.
Detailed warnings for the vehicle battery:
® Wear eye protection.
b. Bat~ery acid is highly corrosive. Wear pro-
~ tect1ve gloves and eye protection. Ill>-
279