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78Instruments and controls
Diesel fuel system, bleeding 3 138.
Notice
To ensure the fuel level is displayed
correctly, the ignition must be
switched off before refuelling. Avoid
minor fuel top-ups (e.g. less than
5 litres) to ensure accurate readings.
Because of the fuel remaining in the
tank, the top-up quantity may be less
than the specified tank capacity.
Fuel economy gaugeThe fuel economy gauge provides an
instantaneous calculation of fuel
efficiency based on current driving style.
The gauge uses colours to indicate current fuel efficiency:Green=best fuel economy is
being achievedYellow=driving style too
aggressiveOrange=least efficient fuel
economy
The fuel economy gauge is enabled
by default. It can be disabled via the
Infotainment system. Refer to
Infotainment system manual for
further information.
Service display
When the ignition is switched on, the
remaining distance before the next
service is due may be shown briefly in the Driver Information Centre. Based
on driving conditions, the interval at
which a service will be indicated can
vary considerably.
The distance before service display
can also be shown by pressing button on end of wiper lever for approx.
5 seconds.
When the remaining distance before
the next service is less than
1000 miles or 1 month, a message
appears in the Driver Information
Centre.
When the distance reaches 0 miles or
the service date is due, control
indicator F illuminates in the
instrument cluster and the Driver
Information Centre respectively, and
a corresponding message appears in the Driver Information Centre.
The vehicle needs a service. Seek the assistance of a workshop.
Resetting the service display After a service, the service displaymust be reset:
Select the distance before service
display in the Driver Information
Centre, then press and hold button on end of wiper lever for approx.
10 seconds.
Trip computer 3 88.
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Instruments and controls79
Driver Information Centre 3 86.
Service information 3 165.
Control indicators The control indicators described are
not present in all vehicles. The
description applies to all instrument
versions.
Depending on the equipment the
position of the control indicators may
vary.
When the ignition is switched on,
most control indicators will illuminate
briefly as a functionality test.
The control indicator colours mean:red=danger, important
reminderyellow=warning, information, faultgreen=confirmation of activationblue=confirmation of activationwhite=confirmation of activation
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82Instruments and controls
If both control indicators VON and
* OFF are illuminated
simultaneously, there is a system
failure. The status of the system is not discernible, therefore no person is
permitted to occupy the front
passenger seat. Contact a workshop
immediately.
If illuminated in conjunction with v or
F , seek the assistance of a workshop.9 Danger
Risk of fatal injury for a child using
a child restraint system together
with activated front passenger
airbag.
Risk of fatal injury for an adult
person with deactivated front
passenger airbag.
Airbag system 3 50, belt tensioners
3 47, airbag deactivation 3 55.
Charging system p illuminates red.
Illuminates briefly when the ignition is
switched on.
Illuminates when the engine is
running
If control indicator p illuminates
when the engine is running
(accompanied by a warning chime):
Stop, switch off engine.
Vehicle battery is not charging.
Engine cooling may be interrupted.
Power to the brake servo unit may be
cut. Seek the assistance of a
workshop.
Malfunction indicator light Z illuminates or flashes yellow.
Illuminates when the ignition is
switched on and goes out shortly after
the engine starts.
Illuminates when the engine isrunning
Fault in the emission control system. The permitted emission limits may be exceeded. Seek the assistance of a
workshop immediately.Flashes when the engine is
running
Fault that could lead to catalytic
converter damage. Ease up on the
accelerator until the flashing stops.
Seek the immediate assistance of a
workshop.
Service vehicle soon
F illuminates in yellow.
Illuminates when the ignition is
switched on and goes out shortly after the engine starts.
May illuminate together with other
control indicators and a
corresponding message in the Driver
Information Centre. Seek the
assistance of a workshop
immediately.
Stop engine C illuminates in red.
Illuminates briefly when the ignition is
switched on.
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152Vehicle care
Relearn function
After changing wheels, the system
needs to recalculate.
With the vehicle stationary, select the tyre pressure menu in the Driver
Information Centre by pressing button
on end of wiper lever. Press and hold button for approx. 3 seconds to
initialise recalculation. A
corresponding message appears in
the Driver Information Centre.
Several minutes of driving may be
required to complete the relearn
process.
If problems occur during the relearn
process, a warning message is
displayed in the Driver Information
Centre.
Driver Information Centre 3 86.
Vehicle messages 3 87.
General information The use of commercially available
liquid tyre repair kits can impair the
function of the system. Factory-
approved repair kits can be used.
Tyre repair kit 3 154.
External high-power radio equipment
could disrupt the tyre pressure
monitoring system.
Each time the tyres are replaced, tyre
pressure monitoring system sensors
must be dismounted and serviced by a workshop.
Tread depth
Check tread depth at regular
intervals.
Tyres should be replaced for safety
reasons at a tread depth of 2-3 mm
(4 mm for winter tyres).For safety reasons it is recommended
that the tread depth of the tyres on
one axle should not vary by more than
2 mm.
The legally permissible minimum
tread depth (1.6 mm) has been
reached when the tread has worn
down as far as one of the tread wear
indicators (TWI). Their position is
indicated by markings on the
sidewall.
If there is more wear at the front than
the rear, swap round front wheels and
rear wheels. Ensure that the direction
of rotation of the wheels is the same
as before.