Winter operation
At temperatures below 20° F (-7° C), Diesel
fuel No.
2 loses its fluidity due to wax separa-
tion, which may clog the fuel filter or tank fil-
ter and keep the engine from running .
To help the filter from being clogged by wax,
the fuel filter in your vehicle is automatically
preheated. Preheating the fuel filter makes
operation of your vehicle possible with Diesel
fuel No. 2 down to -10° F (-24° C).
If you expect temperatures below 5° F
(-15° C) ask your fuel dealer whether their
Diesel fuel No. 2 is sufficiently winterized for
the prevailing and expected temperatures.
If not winterized or insufficiently winterized
Diesel fuel has already thickened to the extent
that the engine will not start, warm the vehi-
cle up by leaving it in a heated garage.
It is normal that the engine noise level (die-
seling) is louder during the warm-up period in
winter.
It is also norma l when whitish-blue
smoke comes out of the tailpipe after start ing
and during warm-up . The amount of smoke
depends on the outs ide temperature.
Do not let your Diesel engine idle unnecessari-
ly after a cold start. Driving off slowly will
shorten the warm-up period .
A WARNING
- Never use "starting assist fluids." They
may be potent ially explosive or cause a
"run-away" engine condition. This could
result in serious engine damage and per-
sonal injury.
- Never use fuel line anti-freeze offered for
gasoline engines .
0 Note
- Refueling with gasoline when your vehi-
cle has a diesel engine can cause very se-
rious and expens ive engine and fuel sys-
tem damage that is not covered by any
Audi Limited Warranty.
- If you put any amou nt of incorrect fuel in
the fuel tank, do not start the engine un-
-
Fuel supply and filling your fuel tank 251
der any circumstances. Immediately con-
tact the nearest authorized Audi dea ler
or authorized Audi Service Facility for as-
sistance. These fuels contain substances
that can severely damage the fuel sys-
tem and the engine if the engine is start -
ed.
- Vehicles with diesel engines must never
be refueled or driven with gasoline, kero-
sene, heating oil, or other non-specified
fuels that have not been expressly ap-
proved for use with the diesel engine.
Other kinds of fuel can cause serious
damage to the fuel system and the en-
gine that is not covered by any Audi Lim-
ited Warranty.
- If Diesel fue l should get on any rubber
hose, it must be wiped off immediately.
Then wash the contaminated hose por-
tion with soap and warm water. Do not
allow Diesel fuel to remain on connect-
ing hoses . They may develop leaks and
cause serious damage.
Fuel tank
Fuel filler neck
The fuel filler neck is located on the right rear
side panel behind the fuel filler flap.
If the power locking system shou ld fail, you
can still open the flap manually - for detailed
instructions see ¢
page 254.
You can find the fuel tank capacity of your ve-
hicle in c::> page 315.
The label on the inside of the fuel filler flap
tells you the correct fuel for your vehicle. For
more information abo ut fuel specifications,
see c::>
page 249.
Your vehicle fuel tank has an on-board refuel-
ling vapor recovery system. This feature helps
to prevent fue l vapors from escaping from the
tank and pollut ing the environment while you
refuel your vehicle. In order to fill the tank
properly while protecting the environment,
please follow this refueling procedure careful-
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