Diesel Particulate Filter; Engine Compartment - Audi A7 2017 Owner's Manual

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- 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 switch off the ignition while the vehi-
cle is moving.
- Do not continue to operate your vehicle un-
der these conditions, as otherwise fuel can
reach the catalytic converter. This could re-
sult in overheating of the converter, requ ir-
ing its replacement.
- To assure efficient operation of the Emis-
s ion Control System:
- Have your vehicle maintained properly and
in accordance with the service recommen-
dations in your Warranty
&
Maintenance
book let.
- Lack of proper maintenance as we ll as im-
proper use of the vehicle will impair the
function of the emission control system
and could lead to damage.
®
For the sake of the environment
Even when the Emission Control System is op -
erating 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 being used. Using a differ-
ent brand of fue l may help, or filling the ta nk
with lead-free super grade gasoline .
Diesel
particulate
filter
Applies to: vehicles with diesel eng ine
The diesel particulate filter filters nearly all of
the soot particles out of the exhaust. The filter
cleans itself automatically under normal driving
conditions . If the filter cannot clean itself (for ex-
ample , because you are only driving short distan-
ces), the fi lter becomes clogged with soot and
the
II
symbo l for the diesel particulate filter il-
luminates ¢ page 17.
A
WARNING
- Do not park your vehicle over flammable
materials such as grass or leaves because
-
Checking
and Filling
the high temperature
of the diesel particu-
late filter could start a fire.
- Do not apply an underbody protectant in the
exhaust system area or a fire could start.
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 filling fluids, there is a risk of in-
jury, scalding, accidents, and burns. For this
reason, follow all the warnings and general
safety precaution s provided in the following in·
formation . The engine compartment is a dan-
gerous area on the vehicle.
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A
WARNING
=
=--
- Turn the engine off.
- Switch the ignition off.
- Set the parking brake.
- Select the P selector lever position.
- Let the engine cool down.
- 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 .
- Keep children away from the engine com-
partment .
- Never sp ill fluids on a hot engine. These flu-
ids (such as the freeze protection contained
in the coolant) can catch fire.
- Avoid short circuits in the electrical system.
- 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 personal injury.
- Never open the cap on the coolant expan-
sion tank when the engine is warm . The
coo ling system is under pressure.
- To protect your face, hands, and arms from
hot steam or coolant, cover the cap with a
large cloth when opening.
199

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