Instruments and warning/indicator lamps19
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data sideways. Drive carefully to the nearest qualified workshop and
have the fault rectified.
Anti-lock brake system (ABS)
The warning lamp monitors the ABS and the electronic
differential lock (EDL).The warning lamp
lights up for a few seconds when the ignition
is switched on and while the engine is being started. The lamp goes
out again once the system has run through an automatic test
sequence.
There is a fault in the ABS if:
•
the warning lamp
does not light up when the ignition is
switched on,
•
the warning lamp does not go out again after a few seconds,
•
the warning lamp lights up when the vehicle is moving.
The vehicle can still be braked in the normal way (except that the
ABS control function is out of action). Please take the vehicle to a
qualified workshop as soon as possible. For further information on
the ABS ⇒page 132.
If a fault occurs in the ABS, the ESP warning lamp will also light up.
Fault in the main brake system
If the ABS warning lamp
lights up together with the brake
warning lamp
⇒page 35, this indicates a fault in the ABS func-
tion, and possibly a malfunction in the main brake system as well
⇒.
If there is a malfunction in the brake system the symbol
will light
up in the instrument cluster. Please refer to ⇒page 18.Fault on the electronic differential lock (EDL)
The EDL works in conjunction with the ABS. If a malfunction should
occur in the EDL, this is indicated by the ABS warning lamp
.
Please take the vehicle to a qualified workshop as soon as possible.
For further information on the EDL ⇒page 132.
WARNING
•
If the brake warning lamp
lights up together with the ABS
warning lamp
, the brake fluid level in the reservoir is too low
and this may cause an accident. Stop the vehicle and do not drive
on. You should obtain professional assistance.
•
If the brake fluid level is OK, the fault in the brake system may
have been caused by a failure of the ABS control function. As a
result the rear wheels can lock relatively easily when braking. This
could cause the tail of the vehicle to skid sideways. Drive carefully
to the nearest qualified workshop and have the fault rectified.
WARNING (continued)
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Driver information system 24MenusIntroductionSome of the functions in your vehicle can be adjusted, activated and
controlled via menus (e.g. parking aid*). With the aid of the menus
you can then also select the information you wish to see on the
display. This only works when the ignition is on. The menus are acti-
vated via the button and the rocker switch on the wind-
screen wiper lever ⇒fig. 12.The main menu lists the different display types (for technical
reasons, illustrations in this manual are in German language):
Set (Einstellen)
Check (Abfragen)
Menu off (Menü aus)
Help (Hilfe)
The 4 main menu options have the following submenus:
Fig. 12 Windscreen
wiper lever: Controls
for menu displayFig. 13 Display: Main
menu
Reset
Set
Clock
⇒page 26
Computer
⇒page 26
Speed warning
⇒page 32
Language: you can select
one of 6 languages.
⇒page 26
Units: for measuring dis-
tance, fuel consumption
and temperature
⇒page 26
Lights
⇒page 52 ⇒page 54
Wipers (service position)
⇒page 61
Windows
⇒page 43
Doors (Auto Lock)
⇒page 43
Parking aid*
⇒page 85
Check
ServiceChassis number
⇒page 196
Menu off
The menu display will disappear and the lap timer
will appear.
Help
The Help function explains the symbols in the
menu display.
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Driver information system 32
NotePlease bear in mind that, even with the speed warning function, it is
still important to keep a check on the car's speed with the speedom-
eter and to observe the statutory speed limits.Applies to vehicles: with speed warning functionSetting speed limit warning 1
Speed limit warning 1 is controlled via the adjuster/test
button.Selecting speed limit
– Drive at the desired maximum speed.
– Press the adjuster/test button ⇒fig. 29 and hold it down
until the symbol ⇒page 31, fig. 28 appears.
Clearing speed limit
– Drive the vehicle at a minimum of 5 km/h.
– Press the adjuster/test button for at least two seconds.The speed warning symbol
lights up briefly in the display when
the button is released to confirm that the selected speed has been
stored. The speed limit that has been set remains stored until another speed is set with a brief push of the button, or until the
memory is cleared with a long push of the button.
Applies to vehicles: with speed warning functionSetting speed limit warning 2
Speed limit warning 2 is set using the switches on the
windscreen wiper lever.Selecting speed limit
– Switch off the ignition.
– Briefly press the adjuster/test button in the instrument
cluster ⇒fig. 29. The mileage recorder display and the
digital clock will light up.
– Press the adjuster/test button for at least 2 seconds. The
display will show the speed limit which is currently set or,
if no speed limit has been set, the crossed out warning
symbol for speed limit 2.
– To change the speed limit, press the top or bottom of the
function selector switch on the windscreen wiper lever
⇒fig. 30. The speed limit displayed will then increase
or decrease in increments of 10 km/h.
Fig. 29 Detail of the
instrument cluster:
Adjuster/test button
Fig. 30 Controls
AA
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Driver information system 34Yellow symbols are accompanied by one warning chime. The func-
tion indicated should be checked as soon as possible. If several
faults are detected at the same time, the symbols are displayed one
after the other for about 2 seconds at a time.
Driver messages
Additional messages to assist the driver are displayed in
conjunction with the warning lamps and symbols in the
instrument cluster.The display will show the appropriate message if the system detects
a bulb failure ⇒page 37, if the brake pads are worn or you have not
yet selected a gear on a vehicle with R tronic.
The driver can also call up messages in the display for additional
information if a red warning symbol starts flashing.
Calling up driver messages
For example, in the event of an oil pressure malfunction the oil pres-
sure symbol
will appear in the display. If you now press the
adjuster/test button ⇒fig. 31 for at least one second, the following
message will appear in the display:
SWITCH OFF ENGINE AND CHECK OIL LEVEL
The message will disappear from the display after about 5 seconds.
If required, the message can be called up again by briefly pressing
the adjuster/test button.
Brake pads worn
⇒page 37
Speed warning 1*
⇒page 37
Speed warning 2*
⇒page 37
Dynamic headlight range con-
trol faulty
⇒page 37
Washer fluid level low
⇒page 37
Battery voltage too high or too
low
⇒page 37
Bulb monitor
⇒page 37
or BRAKE
LIGHT
Brake light failure
⇒page 38
Light sensor/rain sensor (auto-
matic headlights) defective
⇒page 38
and
Selector lever defective*
No R gear*
⇒page 38
and
Clutch overheating*
⇒page 38
Fig. 31 Detail of the
instrument cluster:
Adjuster/test button
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Driver information system35
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
Fault in the brake system
The warning lamp flashes when the handbrake is applied,
or if the brake fluid level is too low or if there is a fault in
the ABS system.If the symbol
flashes in the display when the handbrake
is not applied, there is a fault in the brake system. One of the
following messages will appear in the display together with
the symbol:
Stop vehicle and check brake fluid level
Brake fault ! Drive carefully to nearest workshop
–Stop the vehicle.
– You should obtain professional assistance.
If the ABS fails, the ABS warning lamp
will light up together with
the brake warning symbol
⇒.
Handbrake applied
The warning lamp
also lights up when the handbrake is applied.
In addition to this, a warning buzzer will sound after driving for
3 seconds at a speed above 5 km/h.
WARNING
•
If the brake fluid level in the reservoir is too low, this could
result in an accident. Do not drive on. You should obtain profes-
sional assistance.
•
If the brake warning lamp lights up together with the ABS
warning lamp, this can mean that the control function of the ABS
is out of action. As a result the rear wheels can lock relatively
easily when braking. This could cause the tail of the vehicle to skid
sideways. Drive carefully to the nearest qualified workshop and
have the fault rectified.
Fault in the cooling system
Faults in the cooling system must be rectified immedi-
ately.If the
symbol flashes in the display, this means that either
the coolant temperature is too high or the coolant level is
too low. The following message will appear in the display
together with the symbol:
Switch off engine, check coolant level
– Stop the vehicle.
– Switch off the engine.
– Check the coolant level ⇒page 160.
– Add more coolant if necessary ⇒page 160.
– Wait for the symbol to go out before driving on.
– Obtain professional assistance if necessary.
If the coolant level is correct, the overheating may be caused by a
malfunction of the radiator fan.
If the alternator warning lamp lights up as well ⇒page 18, it is
possible that the drive belt has broken.
WARNING
•
If your vehicle should break down for technical reasons, stop it
at a safe distance away from moving traffic, switch off the engine
and turn on the hazard warning lights ⇒page 56, “Hazard
warning lights ”.
•
Never open the engine lid if you can see or hear steam or
coolant escaping from the engine compartment; there is a risk of
being scalded. Wait until you can no longer see or hear escaping
steam or coolant.
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Driver information system 36•
The engine compartment of any motor vehicle is a dangerous
place. Before carrying out any work in the engine compartment,
switch off the engine and allow it to cool down. Please observe the
important safety warnings ⇒page 155, “Working on components
in the engine compartment”.Caution
Do not drive on if the symbol
has come on to indicate a fault in
the cooling system, otherwise there is a risk of damaging the
engine.
Engine oil pressure too low
If the engine oil pressure is too low the fault must be recti-
fied immediately.If the
symbol flashes in the display, the oil pressure is
too low. The following message will appear in the display
together with the symbol:
Switch off engine and check oil level
– Stop the vehicle.
– Switch off the engine.
– Check the engine oil level ⇒page 157.
– Obtain professional assistance if necessary.
If the engine oil level is too low
If the engine oil level is too low, add more oil ⇒page 158.If the engine oil level is correct
If the
symbol flashes and the engine oil level is correct, obtain
professional assistance. Do not drive on. Do not continue to run the
engine, not even at idle speed.
Applies to vehicles: with tyre pressure monitoring systemTyre pressure monitoring system
The tyre pressure should be corrected as soon as possible
if it is too low.If the
symbol appears, the tyre pressure on at least one
of the wheels is too low. The message Tyre pressures too
low will be displayed.
–Stop the vehicle.
– Check the tyre(s).
– Adjust the tyre pressure ⇒page 167.
For more detailed information on the tyre pressure monitoring
system please refer to ⇒page 172.Fuel level low
When this symbol
comes on for the first time, there are about
10 litres of fuel left in the tank. You should fill up as soon as possible
⇒page 152.
If this warning symbol lights up although the fuel tank is sufficiently
filled, there is a malfunction in the fuel tank system. The display will
also show the driver message Tank system malfunction ! Contact
workshop. Please take the vehicle to a qualified workshop.
WARNING (continued)
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Driver information system37
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
Check engine oil level
Please check oil level
If the symbol lights up, add 1 litre of oil at the next opportunity
⇒page 158.
Engine oil sensor defective
If the
symbol lights up, take the vehicle to a qualified workshop
and have the oil level sensor checked.
Front brake pads worn
If the
symbol lights up, have the front brake pads (and, for
safety's sake the rear pads as well) inspected by a qualified
workshop.
Speed warning 1
If the
symbol lights up, this means you are exceeding the speed
that has been pre-set with the speed warning function. You should
reduce your speed accordingly ⇒page 31.
Speed warning 2
If the
symbol lights up, this means you are exceeding the speed
that has been pre-set for speed warning 2. You should reduce your
speed accordingly ⇒page 31.
Headlight range control defective
This symbol
indicates a malfunction in the dynamic headlight
range control. Take the vehicle to a qualified workshop to have the
dynamic headlight range control function repaired.
Washer fluid level low
If the
symbol lights up, top up the fluid for the windscreen
washer and headlight washer system ⇒page 164.
Battery voltage too high or too low
If the
symbol lights up, take the vehicle to a qualified workshop
and have the following items checked:
•
Poly-V belt
•
Battery condition
It is also advisable to check whether the alternator warning lamp
has come on ⇒page 18.
Bulb monitor
The bulb monitor checks whether the lights on the vehicle
are working.If a defective bulb is detected, or if one of the lights has failed for
any reason, the bulb monitor symbol
will appear in the display
together with an additional message (which goes out after
5 seconds). For instance, if the rear left turn signal is not working,
the display in the instrument cluster will show the following
message:
REAR LEFT TURN SIGNAL
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Driver information system 38The message disappears after 5 seconds. Press the adjuster/test
button ⇒page 10, fig. 2 briefly if you wish to call up the message
again.
If the display indicates that one of the lights is not working, this can
have a number of causes:•
Bulb failure ⇒page 193.
•
A “blown” fuse ⇒page 190, “Changing fuses”.
•
Defective electrical wiring.
Have the components replaced or the wiring repaired as necessary
by a qualified workshop.
WARNING
•
Bulbs are sensitive to pressure. The glass can break when you
touch the bulb, causing injury.
•
Incorrect handling of the high-voltage element of xenon gas-
discharge bulbs can have potentially fatal consequences.
Brake light failure
If the symbol
or the text BRAKE LIGHT lights up, check the
following components:
•
Brake light bulbs
•
Wiring connections
•
Brake light switch
Have the components repaired or replaced by a qualified workshop.Note
The brake light switch is only tested during the initial systems check
after starting the engine.
Applies to vehicles: with light sensor/ rain sensorLight sensor/rain sensor
This indicator lamp comes on if the automatic headlights/
automatic wipers are defective.If the
symbol appears, this means that the light sensor/ rain
sensor is not functioning. For safety reasons, the dipped beam
headlights will then be switched on permanently when the light
switch is set to the AUTO position. However, you can still switch the
lights on and off in the normal way with the light switch. If the rain
sensor is defective, the functions operated via the windscreen wiper
lever will still be available. You should have the light sensor/ rain
sensor checked by a qualified workshop as soon as possible.
Applies to vehicles: with R tronicSelector lever defective
and
Selector lever defective! No R gear!
If these symbols light up, there is a fault in the R tronic selector
lever. The indicators on the selector lever will go out or flash. It is no
longer possible to engage reverse gear. If you were using the
gearbox in manual mode, it will switch back to automatic mode.
You can continue to change gear manually. Starting in neutral (N),
pull the paddle lever on the steering wheel to engage first gear.
The gearbox will now remain in manual mode and you can select the
gears using the paddle levers.
You should have the selector lever checked by a qualified workshop
as soon as possible.
Applies to vehicles: with R tronicClutch overheating
and
Clutch is overheating ! If possible please stop vehicle.
A8
A+
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