65
Cockpit
Warning and indicator lamps General description
The warning and indicator lamps indicate a number of dif-
ferent functions and possible faults.
Fig. 44 Instrument panel with warning and indicator lamps
Exhaust emission control system⇒ page 66
Airbag system⇒ page 66
Tyre pressure too low⇒ page 67
Cruise speed (Cruise control)⇒ page 67
Trailer turn signals⇒ page 67
Anti-lock brake system (ABS)⇒ page 68
Seat belt warning⇒ page 68
If it stays lit: ASR switched off⇒ page 69
⇒ page 69
⇒ page 165
Left turn signals⇒ page 69
If flashing: the Electronic Stability Control
(ESC) is working or the ASR is working
If the following remain lit: ESC or ASR
faulty⇒ page 69
⇒ page 69
⇒ page 165
Alternator⇒ page 70
Main beam headlights⇒ page 70
Handbrake on⇒ page 70
⇒ page 77
Engine management (alternative to )⇒ page 70
Glow plug system (alternative to )⇒ page 70
Fault in brake system⇒ page 71
Right turn signals⇒ page 69
Safety FirstOperating InstructionsPractical TipsTechnical Specifications
66Cockpit
Note
A number of functions are monitored by the auto-check control
⇒ page 76. If a malfunction should occur, this will be shown by the dis-
play in the instrument panel either with a red symbol (priority 1 - danger) or
a yellow symbol (priority 2 - warning).
Exhaust emission control system
If the warning lamp lights up continuously you should take your vehicle to a
specialised workshop as soon as possible in order to have the fault re-
paired.
If the warning lamp flashes drive on at reduced speed and seek professio-
nal help in order to avoid damage to the catalytic converter.
For further information on the catalytic converter, see ⇒ page 195.
Airbag system
This warning lamp monitors the airbag and belt tension de-
vice system.
The warning lamp should light up for a few seconds when the ignition is
switched on.
If the warning lamp does not go out, or if it lights up, flashes or flickers
when the vehicle is moving, this indicates a malfunction in the system.
WARNING
If a malfunction should occur, have the system checked immediately by a
specialised workshop. Otherwise there is a risk that the airbag system
and/or belt tensioners may not be triggered in an accident.
67
Cockpit
Tyre pressure warning lamp*
The tyre pressure should be corrected as soon as possible if
it is too low.
Fig. 45 Display: system
fault
Fig. 46 Display: warning
message The yellow warning
lamp remains on if the system is faulty or if
the pressure is too low in at least one tyre. In the event of a system
fault, the letters TPMS are displayed in the centre of the instrument
panel ⇒ Fig. 45. If the tyre pressure drops rapidly, message A
⇒ Fig. 46 will be shown on the central display of the instrument
panel. If the pressure loss is more gradual, message B ⇒ Fig. 46
will be shown on the central display of the instrument panel. This
message does not show the tyre affected. Should any of these
warnings be displayed:
– Stop the vehicle.
– Check the tyres. Although the warning corresponds to just one
tyre, you should also check the others.
– Correct the tyre pressure ⇒ page 242.
For more detailed information on the tyre pressure monitoring system,
please refer to ⇒ page 241.
Cruise speed (Cruise control)*
The indicator lamp on the instrument panel lights up when the cruise
control system is operating.
Trailer turn signals*
This turn signal lamp flashes when the turn signals are op-
erating while towing a caravan or trailer. The turn signal lamp flashes when the turn signals are operated if a trail-
er is correctly coupled to the vehicle.
Safety FirstOperating InstructionsPractical TipsTechnical Specifications
68Cockpit
Where a turn signal bulb does not work, either on the trailer or on the tow-
ing vehicle, the turn signal bulb will not flash.
Anti-lock brake system (ABS)
The warning lamp monitors the ABS and the integrated elec-
tronic differential lock (EDL).
The warning lamp lights up for a few seconds when the ignition is switch-
ed on and while the engine is being started. The lamp goes out again after
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 brake in the normal way (except that the ABS control
function is out of action). Please take the vehicle to a specialised workshop
as soon as possible. For further information on the ABS, see ⇒ page 189.
If a malfunction should occur in the ABS, the ESC warning lamp will also
light up.
Entire brake system fault
If the ABS warning lamp lights up together with the brake warning lamp
⇒ page 71 (with the handbrake released), this indicates not only a
fault in the ABS function, but probably also a malfunction in the main brake
system ⇒
.
The symbol will light up on the instrument panel if there if a fault in the
brake system. Please refer to ⇒ page 78. Electronic differential lock (EDL) fault
The EDL works in conjunction with the ABS. The ABS indicator lamp will light
up to indicate an EDL fault. Please take the vehicle to a specialised work-
shop as soon as possible. For further information on the EDL, see
⇒ page 190.
WARNING
● Before opening the bonnet and checking the brake fluid level, ob-
serve the warning information in ⇒ page 227, Work in the engine com-
partment.
● If the brake warning lamp should light up together with the ABS
warning lamp , stop the vehicle immediately and check the brake fluid
level in the reservoir. If the fluid level has dropped below the "MIN" mark
you must not drive on, as there is a risk of accident. Obtain technical as-
sistance.
● If the brake fluid level is correct, the fault in the brake system may
have been caused by a fault in the ABS control function. As a result, the
rear wheels can lock relatively easily when braking. Under certain cir-
cumstances, the rear of the vehicle could suddenly sway from side to
side, with the subsequent danger of skidding. Drive carefully to the near-
est specialised workshop and have the fault repaired.
Seat belt warning lamp*
The warning lamp acts as a reminder to the driver to fasten
the seat belt. After switching on the ignition, the warning lamp will remain lit until the
driver and front passenger (if applicable) have fastened their seat belts.
When the vehicle has reached a certain speed, you will also hear a warning
signal and the warning light will flash.
For further information on the seat belts, see ⇒ page 23.
69
Cockpit
Turn signals and hazard warning lights
Depending on which turn signal is operated, either the left or right turn
signal lamp flashes. Both turn signal lamps will flash when the hazard warn-
ing lights are switched on.
If a turn signal fails, the indicator lamp will start flashing twice as fast as
normal.
This does not apply when towing a trailer. Where a turn signal bulb does not
work, either on the trailer or on the towing vehicle, the turn signal bulb will
not flash. For further information on the turn signals, see ⇒ page 122.
Electronic Stability Control (ESC)* /
There are two control lamps for the electronic stability con-
trol. The lamp provides information concerning the func-
tion and the provides information on the disconnection
status
Both lamps come on together when the ignition is switched on and should
go out after approx. 2 seconds, which is how long the function check lasts.
This programme includes the ABS, EDL and ASR. This also includes the
brake assistance system (BAS), automatic cleaning of the brake discs and
the trailer stability programme (TSP).
The warning lamp has the following functions:
● It flashes whilst driving when the ASR/ESC is activated.
● It will light up continuously if there is a fault in the ESC.
● As the ESC operates in conjunction with the ABS, it will also light up if a
fault should occur in the ABS. If the ESC warning lamp
lights up and stays on after the engine is started,
this may mean that the control system has temporarily switched off the ESC.
In this case the ESC can be reactivated by switching the ignition off and
then on again. If the warning lamp goes out, this means the system is fully
functional.
The lamp provides information about the disconnection status of the
system:
● It stays lit when the ASR is disconnected when pressing the switch.
Traction control system (ASR)* /
The traction control system prevents the driven wheels from
spinning when the vehicle is accelerating
There are two warning lamps for the traction control system: and . Both
lamps come on together when the ignition is switched on and should go out
after approx. 2 seconds, which is how long the function check lasts.
The lamp has the following function:
● It flashes when the ASR is working if the vehicle is moving.
If the system is deactivated or if it has any fault, the warning lamp will re-
main lit. The warning lamp will also light up if a fault should occur in the
ABS because the ASR operates in conjunction with the ABS. For further in-
formation, see ⇒ page 188
The lamp provides information about the disconnection status of the
system:
● It stays lit when the ASR is disconnected when pressing the ASR OFF
switch.
By pressing it again, the ASR function is reactivated and the warning lamp
switched off.
Safety FirstOperating InstructionsPractical TipsTechnical Specifications
70Cockpit
Alternator
The warning lamp signals a fault in the alternator or in the
vehicle's electrical system.
The warning lamp lights up when the ignition is switched on. It should
switch off after the engine has started.
If the warning lamp lights up when you are driving, you can normally
continue as far as the nearest specialised workshop. However, given that
the battery will be running down, any electrical consumption not absolutely
vital should be switched off.
CAUTION
If the coolant warning lamp in the instrument panel lights up as well as
the alternator waning lamp while driving ⇒ page 79, stop the vehicle im-
mediately and switch off the engine. In this case the coolant pump is no
longer working, and there is a risk of engine damage.
Main beam headlights
The indicator lamp lights up when the main beams are on or when the
headlight flasher is operated.
For further information on the main beam headlights, see ⇒ page 122.Handbrake
This lamp lights up when the handbrake is applied.
If you drive faster than 5 km/h with the handbrake on, the following mes-
sage will appear on the instrument panel display 1)
: HANDBRAKE ON. You will
also hear an acoustic warning signal ⇒ page 77.
Engine management
This warning lamp monitors the engine management sys-
tem for petrol engines.
The warning lamp (Electronic Power Control) lights up while the function
is being checked.
Note
If the warning lamp lights up while the vehicle is moving, this indicates a
fault in the engine management system. The vehicle must be taken immedi-
ately to a specialised workshop to have the engine serviced.
Glow plug system
The control lamp lights up while the glow plugs are preheat-
ing the diesel engine. The indicator lamp lights up while the glow plugs are preheating. When
the indicator lamp goes out the engine should be started straight away.
1)
Depending on the version of the model.
71
Cockpit
When the engine is warm, or at outside temperatures above +8 °C, the
warning lamp will only light up very briefly.
Note
● If the glow plug indicator lamp should start flashing while the vehicle is
moving, this indicates a fault in the engine management system. The en-
gine should be serviced without delay.
● If the indicator lamp fails to light up when the ignition is switched on,
this can mean that the glow plug system is defective. The engine should be
serviced.
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 warning lamp flashes (and the handbrake is not applied), stop the
vehicle and check the brake fluid level ⇒
⇒ page 236.
If a failure should occur in the ABS, the ABS warning lamp will light up
together with the brake warning lamp ⇒
.
Handbrake on
The warning lamp also lights up when the handbrake is applied. In addi-
tion to this, the handbrake warning ⇒ page 77 switches on after driving
for 3 seconds at a speed above 5 km/h.
WARNING
● Before opening the bonnet and checking the brake fluid level, ob-
serve the warning information in ⇒ page 227, Work in the engine com-
partment.
● If the brake warning lamp does not go out, or if it lights up when driv-
ing, the brake fluid level in the reservoir is too low and this may cause an
increased accident risk. Stop the vehicle and do not drive on. Obtain
technical assistance.
● If the brake warning lamp lights up together with the ABS warning
lamp, this can mean that there is a fault in the ABS control function. As a
result, the rear wheels can lock relatively easily when braking. Under cer-
tain circumstances, the rear of the vehicle could suddenly sway from side
to side, with the subsequent danger of skidding. Drive carefully to the
nearest specialised workshop and have the fault repaired.
Safety FirstOperating InstructionsPractical TipsTechnical Specifications
72Cockpit
Driver information system
General notes
The driver information system in the instrument panel
shows the status of various on-board systems at a glance.
Fig. 47 Cockpit: Digital
instrument panel display
The display for the driver information system is in the centre of the instru-
ment panel.
The system runs a check on certain components and functions when the ig-
nition is switched on and while the vehicle is moving. The DIS system gives
an audible warning if a fault should occur or if servicing is required, and a
red or yellow warning symbol (in some cases with a corresponding driver
message) appears in the instrument panel display.
The driver is informed on the audio system.
The driver information system includes the following functions:
CD player, radio and telephone display*⇒ page 73Outside temperature display⇒ page 73Gear indicator*⇒ page 74Selector lever positions for the 7-speed automatic
gearbox*⇒ page 185
Selector lever positions with multitronic ®
*⇒ page 182Distance to empty⇒ page 74Door and rear lid warning⇒ page 75Service indicator⇒ page 75auto-check control⇒ page 76Driving tips⇒ page 77Handbrake warning⇒ page 77Bulb monitor*⇒ page 83Onboard computer*⇒ page 86Tyre pressure monitoring*⇒ page 90Navigation information*Separate Instruc-
tion Manual
Note
● If a fault should occur, the display will show a red or yellow warning
symbol. A red warning symbol indicates a serious malfunction ⇒ page 78.
A yellow warning symbol indicates a less serious malfunction ⇒ page 80.