Instruments and Indicator/Warning Lights27
Using the systemSafetyDriving TipsGeneral MaintenanceBreakdown assistanceTechnical Data
Warning lights
Overview
The warning lights indicate certain functions or faults.
Fig. 16 Instrument cluster with warning lights
Turn signal lights (to the left)⇒page 28
Turn signal lights (to the right)⇒page 28
Main beam⇒page 29
Airbag system⇒page 29
Turn signal system for vehicles towing a
trailer⇒page 29
Low beam⇒page 29
Fog lights⇒page 30
Rear fog light⇒page 30
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Instruments and Indicator/Warning Lights
28
WARNING
•If you do not pay attention to the warning lights coming on and
the corresponding descriptions and warning notes, this may result
in severe body injuries or major vehicle damage.
•The engine compartment of your car is a hazardous area. There
is a risk of injuries, scalding, accid ents and fire when working in the
engine compartment, e.g. inspecting and replenishing oil and other
fluids. It is also essential to observe all warnings ⇒page 219.
Note
•Arrangement of the indicator lights depends on the model and model
version. The symbols shown in the following functional description are to
be found as indicator lights in the instrument cluster.
•Operational faults are shown in the display of the instrument cluster as
red symbols (priority 1 - danger) or yellow symbols (priority 2 - warning).
Turn signal system
Either the left or right indicator light flashes depending on the posi-
tion of the turn signal lever.
The indicator light flashes at twice its normal rate if a turn signal light fails.
This does not apply when towing a trailer.
EPC fault light (petrol engine)⇒ page 30
Diesel particle filter (diesel engine)⇒page 30
Glow plug system (diesel engine)⇒page 31
Coolant temperature/coolant level⇒page 32
Brake pad wear⇒page 32
Bonnet⇒page 32
Fuel reserve⇒page 32
Engine oil⇒page 33
Open door⇒page 34
Fluid level in windshield washer system⇒page 34
Bulbs⇒page 34
Control system for exhaust⇒page 34
Electronic stability programme (ESP)*⇒page 34
Traction control system (TCS)*⇒page 35
Antilock brake system (ABS)⇒page 35
Electronic immobiliser⇒page 36
Brake system⇒page 36
Dynamo⇒page 37
Seat belt warning light⇒page 37
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Instruments and Indicator/Warning Lights29
Using the systemSafetyDriving TipsGeneral MaintenanceBreakdown assistanceTechnical Data
Switching off the hazard warning light system is switched on will cause all
of the turn signal lights as well as both indicator lights to flash.
Further information about the turn signal system
⇒page 59.
Main beam
The indicator light comes on when the main beam is selected or also
when the headlight flasher is operated.
Further information about the main beam ⇒page 59.
Airbag system
Monitoring the airbag system
The warning light
comes on for a few seconds when the ignition is
switched on.
There is a fault in the system if the warning light does not go out or comes
on or flashes while driving ⇒. This also applies if the warning light
does not come on when the ignition is switched on.
The following text will be displayed in the information display*:
AIRBAG FAULT
The functionality of the airbag system is also monitored electronically,
when one airbag has been switched off
Front, side or head front passenger airbags which have been
switched off using the vehicle system tester:
•The warning light lights up for 3 seconds after switching on the igni-
tion and then flashes for 12 seconds afterwards in 2 second intervals. Front, side or head passenger airbags which have been switched off
using the switch (for switching off airbags)* in the storage compart-
ment on the front passenger side:
•The warning light comes on for 3 seconds after the ignition has
been switched on.
•Switching off airbags is indicated in the middle of the dash panel by the
lighting up of the indicator light (airbag switched off)
⇒ page 172.
WARNING
Have the airbag system checked immediately by a specialist
garage if a fault exists. Otherwise, there is a risk of the airbag not
being activated in the event of an accident!
Note
Further information about switching off airbags ⇒page 171, “Deactivating
an airbag”.
Turn signal system for vehicles towing a trailer
The indicator light on vehicles towing a trailer flashes together with the
respective indicator light for the turn signal system.
The indicator light
does not flash if a turn signal light on the trailer or
on the vehicle is not operating.
Low beam
The indicator light comes on when low beam is selected ⇒page 56.
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Instruments and Indicator/Warning Lights
30
Fog lights
The warning light comes on when the fog lights are operating
⇒ page 57.
Rear fog light
The warning light comes on when the rear fog lights are operating
⇒ page 57.
EPC fault light (petrol engine)
The (Electronic Power Control) warning light comes on for a few
seconds when the ignition is switched on.
There is a system fault in the engine control system if the warning light
does not go out or comes on or flashes while driving. The engine manage-
ment system selects an emergency programme which enables you to
drive to the nearest specialist garage by adopting a gentle style of driving.
The following text will be displayed in the information display*:
ENGINE WORKSHOP! (ENGINE FAULT WORKSHOP!)
Diesel particle filter (diesel engine)
In the diesel particle filter the resulting soot particles are
collected and burnt during the combustion of diesel fuel.
Code 7GG on the vehicle data sticker ⇒fig. 17 indicates that
your vehicle is equipped with a diesel particle filter. The vehicle
data sticker ⇒page 269, fig. 211 is located on the floor of the
luggage compartment and is also stated in the Service schedule.
The soot particles, which result from the combustion of diesel fuel, are
collected in the diesel particle filter . If the filter is full, the engine control
unit gives the injection system a command for an additional injection of
fuel with additive into the cylinders so that an automatic cleaning of the
filter is carried out during suitable operating conditions. The additive is
located in a special reservoir under the spare wheel. A higher temperature
in the entire diesel particle filter is achieved as a result of this and thus self-
ignition and following combustion of soot particles occurs. The regenera-
Fig. 17 Vehicle data
sticker
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Instruments and Indicator/Warning Lights31
Using the systemSafetyDriving TipsGeneral MaintenanceBreakdown assistanceTechnical Data
tion procedure lasts about 2 to 3 minutes and is performed without driver
interference.
If the engine control unit detects that the operating conditions for a regen-
eration (combustion of deposited soot particles) of the diesel particle fiter
are not optimal, e.g. slow city driving, a warning light in the instrument
cluster is illuminated
. In order to clean the diesel particle filter, the
vehicle should be driven at an even speed of at least 60 km/h for approx.
5 - 10 minutes. The diesel particle filter is most effectively cleaned if the
vehicle is driven in the 4th or 5th gear within the range of 2 000 to 3 000
rpm.
If these conditions are not met, the warning light
does not go out and
after 10 minutes the warning light begins to flash. ENGINE
WORKSHOP! is shown in the information display*. Afterwards the engine
control unit shifts the engine into the emergency mode, which only has a
reduced power output. After switching the ignition off and on again the
warning light
comes on.
Have the vehicle inspected without delay by your specialist garage.
WARNING
•Please pay attention to the traffic regulations and speed limits.
•The diesel particle filter achieves very high temperatures.
Therefore do not park at points where the hot filter comes into
direct contact with dry grass or other combustible materials - risk
of fire!
•Use neither protective paint for chassis nor anti-corrosion
agent, in order to treat the exhaust system, the heat shields or the
diesel particle filter. The high temperatures can cause the coating
to ignite!
Note
•The servicing of the diesel particle filter and the replenishing of the
additive are performed by a specialist garage in the framework of the
regular inspection, see Service shedule.
•It is prohibited to use biofuel (RME) and diesel fuel mixture for diesel
vehicles which are fitted with diesel particle filter.
Glow plug system (diesel engine)
The indicator light lights up for a cold engine when switching on the
ignition (pre-heat position) 2 ⇒ page 121. Start the engine just as soon as
the indicator light goes out.
The glow plug indicator light will come on for about 1 second if the engine
is at a normal operating temperature or if the outside temperature is
above +5°C. This means that you can start the engine right away.
There is a fault in the glow plug system if the indicator light
does not
come on at all or lights up continuously. Contact a specialist garage as
soon as possible to obtain assistance.
There is a system fault in the engine control system if the warning light
has started to flash while driving. The engine management system selects
an emergency programme which enables you to drive to the nearest
specialist garage by adopting a gentle style of driving.
The following text will be displayed in the information display*:
ENGINE WORKSHOP! (ENGINE FAULT WORKSHOP!)
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Instruments and Indicator/Warning Lights
32
Coolant temperature, Coolant quantity
The warning light comes on for a few seconds 1) when the ignition is
switched on.
The coolant temperature is too high or the coolant level too low if the
warning light
does not go out after the engine is started or flashes while
driving.
3 peeps sound as an additional warning signal.
In this case stop and switch the engine off and check the coolant level;
top up the coolant as necessary. Please also refer to the additional
instructions ⇒page 226, “Replenishing the coolant”.
Do not continue your journey if for some reason it is not possible under
the conditions prevailing to top up with coolant. Keep the engine
switched off and obtain professional assistance from a specialist garage,
otherwise it could lead to severe engine damage.
If the coolant is within the specified range, the increased temperature may
be caused by an operating problem at the coolant fan. Check the fuse for
the coolant fan, replace it if necessary ⇒page 260, “Replacing fuses”.
Do not continue driving if the warning light does not go off although the
fluid is at the correct level and also the fuse of the fan is in proper order.
Contact a specialist garage to obtain assistance.
Please also refer to the additional instructions ⇒page 226, “Replenishing
the coolant”.
The following text will be displayed in the information display*:
STOP CHECK COOLANT SERVICE MANUAL (STOP! CHECK
COOLANT! OWNER'S MANUAL)
WARNING
•If you must stop for technical reasons, then park the vehicle at
a safe distance from the traffic and switch off the engine and switch
on the hazard warning light system ⇒page 59.
•Take care when opening the coolant expansion bottle. If the
engine is hot, the cooling system is pressurized - risk of scalding!
It is best to allow the engine to cool down before removing the cap.
•Do not touch the coolant fan! The coolant fan may switch on
automatically even if the ignition is off.
Thickness of the brake pads
If the warning light comes on, contact a specialist garage immediately
and have the brake pads on all of the wheels inspected.
A peep sounds as an additional warning signal.
The following text will be displayed in the information display*:
CHECK BRAKE PADS
Bonnet
The warning light comes on when the ignition is switched on if the
bonnet is unlocked.
Fuel reserve
The warning light comes on, if the fuel level is still below 8 litres.
1)The warning light on vehicles fitted with information display does not come on
after switching the ignition on, but only if the coolant temperature is too high or the
coolant level is too low.
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Instruments and Indicator/Warning Lights33
Using the systemSafetyDriving TipsGeneral MaintenanceBreakdown assistanceTechnical Data
A peep sounds as an additional warning signal.
The following text will be displayed in the information display*:
PLEASE REFUEL
Engine oil
The warning light lights up red (low oil pressure)
The warning light comes on for a few seconds 2) when the ignition is
switched on.
Stop the vehicle and switch the engine off if the warning light does not
go off after the engine has started or flashes while driving. Check the oil
level and top up with oil as necessary ⇒ page 223.
3 peeps sound as an additional warning signal.
Do not continue your journey if for some reason it is not possible under
the conditions prevailing to top up with oil. Keep the engine switched off
and obtain professional assistance from a specialist garage, otherwise it
could lead to severe engine damage.
Do not drive any further if the warning light remains on even if the oil is
at the correct level. Do not run the engine not at idling speed either.
Contact the nearest specialist garage to obtain professional assistance.
The following text will be displayed in the information display*:
STOP! OIL PRESS. STOP MOTOR! SERVICE MANUAL (STOP! OIL
PRESSURE STOP ENGINE! OWNER'S MANUAL) The warning light
lights up yellow* (oil quantity too low)
If the warning light lights up yellow, there is not the correct quantity of oil
in the engine. Check as soon as possible the oil level or top up
⇒ page 223 with engine oil.
A peep sounds as an additional warning signal.
The following text will be displayed in the information display*:
CHECK OIL LEVEL
The warning light will go out if the bonnet is left open for more than 30
seconds. If no engine oil has been replenished, the warning light will come
on again after driving about 100 km.
The warning light
flashes yellow* (engine oil level sensor faulty)
A fault on the engine oil level sensor is indicated additionally by an audible
signal and the warning light coming on several times after the ignition has
been switched on.
In this case have the engine inspected without delay by a specialist
garage.
The following text will be displayed in the information display*:
OIL SENSOR WORKSHOP!
WARNING
•If you must stop for technical reasons, then park the vehicle at
a safe distance from the traffic and switch off the engine and switch
on the hazard warning light system ⇒page 59.
•The red oil pressure light is not an oil le vel indicator! One
should therefore check the oil level at regular intervals, preferably
after every refueling stop.
2)The warning light on vehicles fitted with information display does not come on
after switching the ignition on, but only if a fault exists or the engine oil level is too
low.
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Instruments and Indicator/Warning Lights
34
Open door
The warning light comes on if one or several doors are opened or if the
boot lid is opened.
The warning light on vehicles fitted with information display comes on
when switching the ignition off. The warning light goes out about 15
seconds after locking the vehicle.
The warning light on vehicles fitted with information display goes out after
switching the ignition off.
Windshield washer fluid level
The warning light comes on when the ignition is switched on if there is
insufficient fluid in the windshield washer system. Top up the fluid
⇒ page 233.
A peep sounds as an additional warning signal.
The following text will be displayed in the information display*:
TOP UP WASH FLUID
Light bulbs
The warning light comes on if a light bulb is damaged:
•brakes applied (brake light)
•in lighting (low beam and/or rear light)
A peep sounds as an additional warning signal. The following text will be displayed in the information display*:
LIGHTS FAILURE
or BRAKE LIGHTS FAILURE
Control system for exhaust
The warning light comes on after the ignition has been switched on.
If the warning light does not go out after starting the engine or it lights up
or flashes when driving, a fault exists in an exhaust relevant component.
The engine management system selects an emergency programme
which enables you to drive to the nearest specialist garage by adopting a
gentle style of driving.
The following text will be displayed in the information display*:
EMISSIONS WORKSHOP! (EMISSIONS WORKSHOP)!
Electronic stability programme (ESP)*
The warning light comes on for a few seconds when the ignition is
switched on.
Components of the ESP system also include the Traction Control System
(TCS), Electronic Differential Lock (EDL), the Antilock Brake System ABS
and the braking assistant
The warning light comes on when driving when a control cycle is acti-
vated.
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