2017 AUDI A6 radiator cap

Check ing and F illing
- Do not drive until the fuel tank becomes
complete ly empty . The engine cou ld mis­
fire . Unburned fuel could also get into the
exhaust system and this cou ld cause the
catalytic converter to overheat.
- Do not sw itch off the ignition while the vehi­
cle is moving .
- Do not continue to operate your vehicle un­
der these cond itions, as otherwise fuel can
reach the catalytic converter . This could re­
su lt in overheating of the converter, requ ir­
i ng its replacement .
- To assure efficient operation of the Emis­
sion Control System :
- Have your ve hicle main tained pro perly and
in accordance with the service recommen ­
dations in your Wa rranty & Maintenance
book let.
- Lac k of proper maintenance as well as im ­
proper use of the vehicle will impair the
function of the emission cont rol system
and could lead to damage.
@ For the sake of the environment
Even when the Emission Control System is op­
erat ing properly, the exhaust gas can have a
sulfur-like exhaust gas smell under some op­
erat ing states . This depends on the su lfur
content of the fuel be ing used . Using a differ­
ent brand of fue l may he lp, or filling the tan k
w ith lead-free super grade gasoline.
Diesel particulate filter
A ppl ies to: ve hicles w ith diesel e ng in e
The diesel particulate fi lter filters nearly all of
the soot particles out of the ex haust. The f ilter
cleans i tse lf automatically under normal d riv ing
conditions. If the filte r ca nnot clean itse lf (for e x­
a mple , beca u se you are only driving sho rt distan­
ces), the fi lter becomes clo gged with soot and
the . symbo l for the diesel particulate fi lter il­
lum inates
c:> page 18.
A WARNING
- Do not park you r vehicle over flammable
materials such as grass or leaves because
198 -
the high temperature of the diesel particu­
late filte r could sta rt a fire .
- Do not apply an underbody protectant in the
exhaust system area or a fire could sta rt.
Engine compartment
· Working in the engine compartment
Special care is required if you are working in the
engine compartment
For work in the engine compartment, such as
checking and fill ing fluids , the re is a risk of in­
jury, scalding, accidents , and burns. For this
reason, follow all the warnings and general
safety precaut ions provided in the following in ·
formation . The engine compartment is a dan­
gerous area on the vehicle.
c:> .&, .
A WARNING
-Turn the engine off.
- S witch t he igni tion off.
- Set the park ing bra ke .
- Select the P s elector lever position.
-Let the eng ine cool down .
- Never open the hood when there is steam o r
coo lant escaping from the engine compart­
ment, because there is a risk that you could
be burned . Wait unt il no steam or coolant is
escaping .
- Keep children away from the eng ine com­
pa rtment .
- Never sp ill fluids on a hot eng ine. These flu­
ids (such as the freeze protection contained
in the coolant) ca n ca tch fire .
- Avoid short c ircuits in the electrical system .
- When working in the engine compa rtment,
remember that the radiator fan can switch
on even if the ignition is switched off, wh ich
increases the r is k of p ersona l injury.
- Never ope n the cap on the coolant expan­
sion tank when the engine is warm . The
coo ling system is under p ressure .
- To protect your face, hands, and arms from ho t steam or coolant, cover the cap with a
large cloth wh en opening .
~

co
co
.... N
" N .... 0 0 <..:l 'SI'
The coolant leve l is monitored through the. in­
dicator light
c::> poge 14. However, we do recom­
mend occasionally check ing the coo lant level
manually.
If you m ust add coolant, use a m ixture o f water
and coolant additive . M ixing the coolant additive
w ith d istilled water is recommended.
Coolant additive
The coolan t addi tive is made of ant i-freez ing and
corrosion protection agents. Only use the fo llow­
i n g coo lant additives . These additives may be
mixed wit h each other .
Coolant additive Specification
Gl3 TL774J
Gl2++ TL 774 G
The amount of coo lant add itive that needs to be
mixed with water depends on the climate where
the veh icle will be ope rated. If the coolant addi­
tive percentage is too low, the cool ant can freeze
and damage the engine.
Coolant Freeze protec-
additive tion
Warm regions min . 40% m
in. -13 ° F
max. 45% (-25 °C)
Cold regions min . 50% max . -40 °F
max . 55% (-40 °C)
(D Note
-
Befo re the start of winter, have your author­
i zed Audi dealer or author ized Audi Se rvice
Facility check if the coolant additive in yo ur
vehicle ma tches the percen tage approp riate
fo r th e climate. This is especially import ant
whe n driving in co lder climates .
-If the approp ria te coolant addi tive is no t
available in an emergency, do no t ad d any
other additive. You co uld damage the en­
gine. If this happens, only use wate r and re­
store the correct mixture ratio with the
spec ified coolant additive as soon as possi­
ble.
- Only refill with new coo lant .
- Radiator sealant must not be mixed with
the coo lant .
Checking and Filling
Adding coolant
Fig. 184 En g in e compa rtment : coo lant expa nsion ta nk
cove r
Observe the safety prec autions c::> A in Working
in the engine comportmen t on page 198.
Checking the engine coolant level
Park the vehicle on a level surface.
.,. Switch t he ignit ion off.
.,. Read the coolant level on the coolant expansion
tank
c::> page 201, fig . 182. The coolant level
must be between the MIN and MAX mark ings
when the engine in cold. When the eng ine is
warm it can be slightly above the MAX marki ng.
Adding coolant
Requirement: there must be a residua l amount of
coolant in the expansion tank
c::> (D .
.,. Let the eng ine cool down .
.,. Place a cloth over the coolant expansion tank
cap and unscrew the cap counterclockw ise
c::> .&_ .
.,. Add coo lant m ixed in the cor rect rat io
c::> page 204 u p to the MAX mark ing.
.,. Ma ke sure that the f luid level remains stab le.
Add mo re coolant if necessary.
.,. Close the cap sec urely.
Coo la nt loss usually i ndicates there is a lea k. Im­
med iate ly drive you r ve hicle to a n author ized
Audi dealer or authorized A udi Se rvice Faci lity
and have the cooling system inspected. If the
cooling system is not leak ing, a loss can come
from the coolant boiling through overheat ing
and being pushed out of the cooling system.
205

Checking and Filling
_& 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
Fig. 185 Engine compartment : ca p on brake fl uid re servoir
Observe the safety precautions c::> .&. in Working
in the engine comportment on page 198.
Checking the brake fluid level
• Read the brake fluid level on the brake fluid
reservoir
c::> page 201, fig . 182. The brake fluid
level must be between the MIN and MAX mark­
i n gs c::> .,&. .
The brake fluid level is monitored automatically .
206
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
c:::, &.
The term "vehicle battery" refers to the 12 Volt
battery in your vehicle.
Detailed warnings for the vehicle battery:
®) Wear eye protection.
~ Battery acid is highly corrosive. Wear pro-
~ tect1ve gloves and eye protection. ..,.