2000 AUDI ALLROAD sensor

VE
HICL E OPERA TION-----------------------
'4 WARN ING continued
• Before descending a steep
grade, reduce speed and shift
transmission into a lower gear or
lower driving position. Do not ride
the brakes or hold the pedal down
too long or too often. This could
cause the brakes to get hot and di­
minish braking efficiency.
• If you damage the front spoiler,
or if you install a different spoiler,
be sure the air flow to the front
brakes is not obstructed. Other­
wise the brake system could over­
heat reducing the effective ness of
the entire brake system.
• Failure of one brake circuit will
impair the braking capability re­
sulting in an increased stopping
distance.
Avoid driving the vehicle and have
it towed to the nearest Audi Dealer
or qualified workshop.
204 Electronic differential lock
(EDL)
The EDL operates in conjunction with the
ABS. The EDL acts automatically, i.e. with­
out the driver's intervention.
With the aid of the ABS sensors, this sy­
stem monitors the speed of the driven
wheels up to about 50 mph, 80 km/h .
Within the speed range at which this sy­
stem operates, if the wheels spin (e.g. on
slippery surfaces) they are braked in a con­
trolled manner , and more of the engine's
power is directed to whiche ver wheels
achieve greater traction.
Please note:
• When driving off, always be sure to keep
road conditions in mind as you accelerate.
If a drive wheel spins because it's on a slip­
perier surface, gradually increase the pres­
sure on the accelerator pedal until the car
starts to move. •
When accelerating on slippery surfaces,
such as on ice or snow, always be careful
when depressing the accelerator pedal.
Even with the EDL working, the drive
wheels can spin and reduce your ability to
control your car.
• To prevent the disc brake of the braked
wheel from overheating, if subjected to ex­
cessive loads the EDL cuts out temporarily.
The vehicle remains operational and be­
haves in the same way as a vehicle without
EDL
If a fault occurs in the ABS the EDL is also
not functioning. This is ind icated by the ABS
warning light-see page 125.
ftl WARNING
The increased safety afforded by
EDL does not mean that you can
take safety risks. Always adapt
your driving style to the road con­
ditions and traffic situation.

VEHICLE
OPER ATION----------------------
Operation
The Anti-Lock Brake System (ABS) and the
Electronic Differential Lock (EDU are inte­
grat _ed in the Electronic Stability Progr am. In
a _ddrtron to the data provided by these func­
tions, the ESP control unit requires addition­
al measurement data provided by hig h-per­
forman ?e sensors. The rotat ional speed of
the veh1cle about its vertical axis, vehicle lat­
eral acceleration, brake pressure and the
steering angle are measured.
The direction in which the driverwishes to
travel is determined with the aid of the
stee �ing angle and the vehicle speed and is
contmually compared with the actual be­
havior of the vehicle.
If the data do not match - for example when
a vehrcle is beginning to spin out of control
- the ESP applies the brakes to the appropri­
ate wheels for the given situation and, if
necessar y, changes the vehicle traction
forces so as to reduce the slipping of individ­
ual wheels (ASR anti-slip regulation).
206 The
vehicle is then stabilized by the forces
a ?tin � on the wheel during braking. If the ve­
hicle IS overstee ring (rear tends to skid out
of the turn), the brakes are mainly applied on
the wheel that is on the outside ofthe curve.
In the case of a vehicle that is und ersteering
(tendency to slide out of the curve). the
brakes are applied at the rear wheel that is
on the inside of the curve. An audible signal
�rll accompany the brake application func­
tion.
All �SP senso rs a�e monitored continuously
wh1le the vehicle IS being driven. However,
when the vehicle is driven at low speed on
ex tremely rugged terrain, it is not always
possrble to monrtor the ESP sensors contin­
uously. Thus, in rare and exceptional cases
the ESP itself can deactivate (ESP and ABS
ind icator lights will be lit continuously).
In this case. the ride level adjustment sys­
tem lowers the vehicle to the normal level
If this happens, you may need to select th�
ride level again (see page 153).
Operation of the ESP and ABS is restored
whenever you restart the engine. m
WAR NING
! he Electronic Stability Program
•• nevertheless subject to the laws
of physics. It is particularly impor­
tant to pay attention to this fact on
wet and slippery roads.
It is therefore important that you
always adapt your driving to the
condition of the road and traffic
conditions. Do not allow the in­
creased safety provided by the
Electro nic Stability Program sys­
tem to lull you into accepting addi­
tional safety risks.

AL
PHABET ICAL INDEX----------------
Dust filter . . . . . . . . . . . . . . . . . . . 167
Dynamic headlight dimmer
control .
144
E
Electric adjustable seats . . . . . . . . . 78
Electrical socket....... . 181
Electrical socket in the luggage
compartment . . . . . . . . . . . . . . 181
Electrically heated seats. . . . . . . 150
Electromagnetic interference
compliance . . . . . . . . . . . . . . . . 291
Electronic differential lock . . . . . . 204
Electronic immobilizer . . . . . 57, 124
Electronic speed limiter . . . . . . . . 129
Electronic Stability Program
(ESP) . . . . .
. . 124, 152, 205
Emergency
· - Flasher
-K ey ... 12
5, 152
. 56
- Starting . _. • • • • . . . • • ... .
-T owing . . . . _ .... .. _ .. ... .
- Unlocking fuel tank flap .... .
298 278
281
224 -W
arning triangle ....... .... 263
Emission control system . . . . . . . 197
- Malfunction Indicator Lamp 125
Engine
- Compartment .
. . . • • • • . 232
- Cooling . . . .
. . . . • . • . • . . 238
-D ata .......•• •.... ..•. ... 286
-H ood .... .. ... ... .. •... ... 231
-O il .... ..•• .... . , • 234
- Oil level . . . . . . . . . . . • . . . . . 144
- Oil pressure . . . . . . . 143
-O il sensor defective . . . . . . . 14 4
.E ngine oil
- Adding . . . . . . . . . . . . . . . . . . • . 236
- Additives . . • • • • • . . . . • • 234
- Changing . • • . . . . 236
- Checking ... _ . _ ... ... _ .. _ . . 235
- Grades . .
234
- Te mperature gauge 117
Entering selections into the
menu . . . . . . . . . . . . . . . . . . . . .
132
c£' Envir onment
- Brake fluid . . . . . . . . . . . • . . . 243
-C leaning and protection .... . 212 -C
oolant ...... .... ... ... ... 240
- Driving to minimi ze pollution
and noise . . . .
195
- Engine oil . . . . . . . . . . . . . .
237
-F uel. ............ . •. . . . 223
- Mai ntenance . . . . . . . . . . . . 228
-S tarting procedures .... :. . . 114
- Tire pressure . . . . 253
- Unleaded fuel . . . . . • • . . . . . . 225
-W ashing .. . ... ... ...... . _ 213
Exhaust system .. , .. , • . • • . . 19
7
Expansion tank
. . • . . .. • . . .
239
F
Fan speed ...... ...... ....... . 164
Fastening eyes ...... .....•.. •. _ 89
Fas tening the safety belt 20
Filler cap . . . . . . . . . . . 223
First aid kit . . . . . . . . . . • .
263
Floor jack . . . . . . . . . . . . • 283
Floor mat fasteners . . . • 1 02
Fluid
- Brake
242