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WARNING
● Failure to observe warning lamps and warning messages can result in
serious personal injury or damage to your vehicle.
● The risk of an accident increases if your vehicle breaks down. Use a
warning triangle to draw the attention of other road users in order to pre-
vent danger to third parties.
● The engine compartment is a dangerous area! Before you open the
bonnet to work on the engine or in the engine compartment, you must
switch the engine off and allow it to cool to reduce the risk of scalding or
other injuries. Read and observe the relevant warnings ⇒ page 230.
Note
● The appropriate warning lamp for a fault will light up in vehicles without
warning or information messages in the display.
● In vehicles with warning or information texts on the screen, the appro-
priate warning lamp for a fault will light up and a warning or information
message will also appear on the screen.
Warning symbols
There are red warning symbols (priority 1) and yellow warning sym-
bols (priority 2) Warning reports, Priority 1 (red)
If one of these faults occurs, the warning lamp will flash or light up and will
be accompanied by three audible warnings. This is a danger warning. Stop
the vehicle and switch off the engine. Check the fault and correct it. Obtain
professional assistance if necessary. If several priority 1 faults are detected at the same time, the symbols will be
displayed one after the other for about 2 seconds at a time and will contin-
ue until the fault is corrected.
No menus will be shown in the display for the duration of a priority 1 warn-
ing message.
Examples of priority 1 warning messages (red)
●
Brake system symbol with the warning message STOP BRAKE FLUID
SERVICE MANUAL or STOP BRAKE FAULT SERVICE MANUAL .
● Coolant symbol with the warning message STOP SEE COOLANT IN-
STRUCTION MANUAL.
● Engine oil pressure symbol with the warning message STOP ENGINE
OIL PRESSURE LOW! INSTRUCTION MANUAL .
Warning reports, Priority 2 (yellow)
If one of these faults occurs, the warning lamp lights up, and is accompa-
nied by one audible warning. Check the corresponding function as soon as
possible although the vehicle may be used without risk.
If several priority 2 warning messages are detected at the same time, the
symbols are displayed one after the other for about 2 seconds at a time. Af-
ter a set time, the information text will disappear and the symbol will be
shown as a reminder at the side of the display.
Priority 2 warning messages will not be shown until all Priority 1 warning
messages have been dealt with!
Examples of priority 2 warning messages (yellow): 1)
● Fuel warning light with the information text PLEASE REFUEL.
● Windscreen washer fluid symbol with the information text REFILL
WINDSCREEN WASHER FLUID . Top up the washer fluid level.
1)
Depending on the version of the model.
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Coolant level* / temperature (red)
The warning lamp lights up if the coolant temperature is too
high or if the coolant level is too low.
There is a fault if:
● The warning symbol does not go out again after a few seconds.
● The warning lamp lights up or flashes while the vehicle is moving, and
three acoustic warning signals ⇒
are emitted.
This means that either the coolant level is too low or the coolant tempera-
ture is too high.
Coolant temperature too high
The instrument panel displays the following message 1)
: CHECK COOLANT IN-
STRUCTION MANUAL ⇒ page 237.
First look at the coolant temperature gauge. The coolant temperature is too
high if the needle is over the warning area on the dial. Stop the vehicle,
switch the engine off and wait for it to cool down. Check the coolant level.
If the coolant level is correct, the overheating may be caused by a malfunc-
tion of the radiator fan. Check the radiator fan fuse and have it replaced if
necessary ⇒ page 264.
If the warning lamp lights up again after driving on for a short distance,
stop the vehicle and switch the engine off . Contact an Authorised Service
Centre or a specialised workshop.
Coolant level too low
The instrument panel displays the following message 1)
: STOP CHECK COOL-
ANT INSTRUCTION MANUAL.
First look at the coolant temperature gauge. If the needle is in the normal
range, top up with coolant at the earliest opportunity ⇒
.
WARNING
● If your vehicle is immobilised for technical reasons, move it to a safe
distance from traffic. Turn the engine off, turn the hazard lights on and
place the warning triangle.
● Never open the bonnet if you can see or hear steam or coolant escap-
ing from the engine compartment. Risk of scalding. Wait until you can no
longer see or hear escaping steam or coolant.
● The engine compartment is a dangerous area! Before carrying out any
work in the engine compartment, switch off the engine and allow it to
cool down. Always note the corresponding warnings ⇒ page 230.
Coolant temperature (blue)
This lamp lights up when the coolant is below approximately 45 °C. When it
exceeds this temperature the lamp turns off.
Rear fog light
This warning lamp lights up when the rear fog light is switched on . For
further information see ⇒ page 116.
1)
Depending on the version of the model.
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To do this, drive about 15 minutes in fourth or fifth gear (automatic gear-
box: S gear range) at a speed of 60 km/h, with the engine running at ap-
proximately 2000 rpm. In this way, the pollen build up in the filter is burned.
When cleaning is successful, the indicator turns off.
If the warning lamp does not turn off, or the three lamps turn on (partic-
ulate filter , emission control system fault and glow plugs ), take
the vehicle to a specialised workshop to repair the fault.
WARNING
● Always drive according to the road weather conditions, the terrain
and traffic. Driving recommendations should never lead to illegal ma-
noeuvres in surrounding traffic.
● The diesel engine particulate filter may reach extremely high temper-
atures; it should not enter into contact with flammable materials under-
neath the vehicle. Otherwise there is a risk of fire.
Anti-lock brake system (ABS)*
A warning lamp monitors the ABS. The indicator lamp should light up for a few seconds when the ignition is
switched on. It goes out again after the system has run through an automat-
ic 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, without the ABS function.
Take the vehicle to a specialised workshop as soon as possible. For further
information on the ABS go to ⇒ page 194. If a fault occurs in the ABS, the ESC* (ESP) warning lamp will also light up.
Brake system fault
If the ABS warning lamp
lights up together with the brake warning lamp
, this indicates not only a fault in the ABS function, but also a possible
fault in the brake system ⇒
.
WARNING
● Before opening the bonnet, read and observe the warnings on
⇒ page 230, Working in the engine compartment.
● 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 ⇒ page 242, Brake fluid. If the fluid level has drop-
ped below the “MIN” mark you must not drive on. Risk of accident. Ob-
tain technical assistance.
● If the brake fluid level is correct, the fault in the brake system may
have been caused by a failure of the ABS system. This could cause the
rear wheels to lock quickly when you brake. This could cause the rear to
break away. Risk of skidding. Stop the vehicle and seek technical assis-
tance.
Washer fluid*
This warning lamp lights up to indicate that the windscreen
washer level is too low. This serves as a reminder to fill up the reservoir at the earliest opportunity
⇒ page 239
85
Cockpit
The following message is shown on the instrument panel display* 1)
: REFILL
WINDSCREEN WASHER FLUID .
Alternator
This warning lamp signals a fault in the alternator.
The warning lamp lights up when the ignition is switched on. It should
go out when the engine has started running.
If the warning lamp lights up while driving, the alternator is no longer
charging the battery. You should immediately drive to the nearest special-
ised workshop.
You should avoid using electrical equipment that is not absolutely necessa-
ry because this will drain the battery.
Worn brake pads
If the symbol lights up, have the front brake pads (and, for safety rea-
sons, the rear pads as well) inspected by a specialised workshop. Tyre pressure
The tyre pressure control system controls the tyre speed and
the frequency spectrum of each tyre.
Fig. 52 Centre console:
tyre monitor system but-
ton
The tyre warning lamp 2)
compares wheel revolutions and with this informa-
tion, the diameter of each wheel using the ESC (ESP) sensors. If the diame-
ter of a wheel changes, the tyre warning lamp lights up. The wheel diam-
eter changes when:
● Tyre pressure is insufficient.
● The tyre structure is damaged.
● The vehicle is unbalanced because of a load.
● The wheels of one axle are under more pressure (for example, driving
with a trailer or on extreme slopes).
● The vehicle is fitted with snow chains.
1)
Depending on the version of the model.
2) Depending on the model version
Safety FirstOperating InstructionsPractical TipsTechnical Specifications
86Cockpit
● The temporary spare wheel is fitted.
● The wheel on one axle is changed.
Tyre pressure adjustment
Following the modification to tyre pressure or after changing one or more
wheels, the button ⇒ fig. 52 must be kept pressed while the ignition is on
until an acoustic signal is heard and the warning lamp goes out.
If the wheels are under excessive load (for example, driving with a trailer or
heavy load), the tyre pressure must be increased to the recommended value
for a full load (see the sticker on the inside of the fuel flap). If the tyre moni-
tor system button is pressed down, the new tyre pressures are confirmed.
The tyre pressure warning lamp lights up
If the tyre pressure of one or more wheels is much lower than the value set
by the driver, the tyre control warning lamp lights up ⇒
.
The tyre pressure warning lamp flashes
If the tyre pressure warning lamp flashes, this indicates a fault. Go to the
nearest specialist workshop.
WARNING
● When the tyre pressure warning lamp lights up, reduce speed imme-
diately and avoid any sudden manoeuvre or braking. Stop when possible,
and check the tyre pressure and status.
● The driver is responsible for maintaining correct tyre pressures. For
this reason, tyre pressure must be regularly checked.
● Under certain circumstances (for example, when driving in a sports-
like manner, in winter conditions or on a dirt track) the tyre warning lamp
may light up or function incorrectly.
Note
If the battery is disconnected, the yellow warning lamp lights up after
turning the ignition on. This should turn off after a brief journey.
Brake system*
This warning lamp lights up if the brake fluid level is too low
or if there is a fault in the system.
This warning lamp lights up if
● the brake fluid level is too low ⇒ page 242.
The instrument panel displays the following message 1)
: STOP BRAKE FLUID
INSTRUCTION MANUAL.
● there is a fault in the brake system.
The instrument panel displays the following message 1)
: BRAKE SYSTEM
FAULT INSTRUCTION MANUAL.
This warning lamp can light up together with the ABS system warning lamp.
1)
Depending on the version of the model.
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Cruise speed (Cruise control)*
The warning lamp comes on when the cruise control system
is switched on.
The warning lamp lights up when the cruise control system is switched
on. For further information on the cruise control system, see ⇒ page 190.
Indicator for open doors or tailgate*
This warning lamp lights up if one of the doors or the tail-
gate is open. The warning light should go off when all the doors are closed correctly.
The system also works when the ignition is switched off. It should go off ap-
prox. 15 seconds after the vehicle is locked.
Electromechanical steering*
For vehicles with power steering, the level of steering assistance depends
on the vehicle's speed and on the steering angle.
The warning lamp should light up for a few seconds when the ignition is
switched on. It should go out once the engine is started.
If the battery is disconnected, the indicator remains lit, even with the en-
gine running. The warning light only goes off after a distance of approx. 50
m. There is a fault in the electromechanical steering system if the lamp does
not go out or lights up whilst the vehicle is in motion. The warning lamp
may appear in two different colours to indicate faults. If it lights yellow, this
indicates a minor fault. If it lights red, seek workshop assistance immedi-
ately, as the steering assistance is not working; in this case you should not
keep driving. Stop the vehicle and seek technical assistance. The power
steering does not work if the battery is flat or if the engine is off (for exam-
ple, for towing). You should take into account that you will need considera-
bly more power than normal to steer the vehicle if the power steering is not
working correctly or at all.
For those vehicles fitted with ESC* (ESP) the function “Recommended steer-
ing manoeuvre” is included. See
⇒ page 196.
Emission control system*
This warning lamp monitors the exhaust system.
Warning lamp flashes:
When there is misfiring that can damage the catalytic converter. Reduce
speed and drive carefully to the nearest specialised workshop to have the
engine checked.
The instrument panel displays the following message 1)
: EXHAUST GAS SEE
WORKSHOP.
Warning lamp is lit:
If a fault has developed during driving which has reduced the quality of the
exhaust gas (e.g. lambda probe fault). Reduce speed and drive carefully to
the nearest specialised workshop to have the engine checked.
The following message is shown in the instrument panel display: EXHAUST
GAS SEE WORKSHOP .
1)
Depending on the version of the model.
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Cockpit
Electronic Stability Control ESC (ESP) * /
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 (TCS). 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 when the ASR (TCS)/ESC (ESP) is activated when driving.
● It will light up continuously if there is a malfunction in the ESC (ESP).
● The ESC (ESP) lamp will also come on if a fault should occur in the ABS
because the ESC (ESP) operates in conjunction with the ABS.
If the ESP warning lamp lights up and stays on after the engine is started,
this may mean that the control system has temporarily switched off the ESP.
In this case the ESC (ESP) 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 (TCS) is disconnected after pressing the
switch. Differential lock fault (EDL)*EDL operates along with the ABS in vehicles equipped with
the Electronic Stability Control ESC (ESP)*
A malfunction in the EDL is indicated by the ABS warning lamp . Take the
vehicle to a specialised workshop as soon as possible. For further informa-
tion on the EDL see ⇒ page 197, Electronic differential lock (EDL)*.
Traction control system ASR (TCS)* /
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 (TCS) is activated while driving.
If the system is deactivated or if it has any fault, the warning lamp will re-
main lit. The ASR (TCS) lamp will also come on if a fault should occur in the
ABS because the ASR (TCS) operates in conjunction with the ABS. For fur-
ther information, see ⇒ page 194, Brakes
The lamp provides information about the disconnection status of the
system:
● It stays lit when the ASR (TCS) is disconnected after pressing the OFF
switch.
By pressing again, the ASR (TCS) function is reactivated and the warning
lamp switched off.
Safety FirstOperating InstructionsPractical TipsTechnical Specifications
121
Lights and visibility
Dynamic cornering lights* (AFS)
The dynamic cornering lights only operate if the vehicle is travelling at more
than 10 km/h and the dipped headlights are on. When taking a bend, the
road is illuminated better with directional gas discharge bulbs than with
conventional fixed headlights.
A fault in the system is indicated via the flashing of the control lamp on
the instrument panel. At the same time, a text message with information or
instructions to perform necessary operations may appear on the instrument
panel display. Take the vehicle to a specialised workshop and have the fault
repaired.
If the control bulb lights up on the instrument panel but all the bulbs are
operating correctly ⇒ page 268, there may still be a fault in the dynamic
curve lighting system (AFS). Take the vehicle to a specialised workshop and
have the fault repaired.
WARNING
If the “automatic dipped beam control” is switched on, the dipped beam
headlights will not be switched on in fog. They should be switched on
manually using the light switch. The driver is personally responsible for
the correct use of lights in all situations. “Automatic headlight control”
is merely a system to support the driver. Where necessary, switch on the
lights manually using the light switch.
Fog lights with cornering function*
When the turn signal is switched on to turn or on very tight bends, the right
or left fog lamp automatically comes on to function as a cornering light. The
cornering light only operates if the dipped lights are on.
WARNING
If the “automatic dipped beam control” is switched on, the dipped beam
headlights will not be switched on in fog. They should be switched on
manually using the light switch. The driver is personally responsible for
the correct use of lights in all situations. “Automatic headlight control”
is merely a system to support the driver. Where necessary, switch on the
lights manually using the light switch.
Hazard warning lights
The hazard warning lights are used to draw the attention of
other road users to your vehicle in emergencies.
Fig. 77 Dash panel:
switch for hazard warning
lights
If your vehicle breaks down:
1. Park your vehicle at a safe distance from moving traffic.
2. Press the button to switch on the hazard warning lights ⇒
.
Safety FirstOperating InstructionsPractical TipsTechnical Specifications