Page 82 of 263
80Instruments and controlsThe highlighted grip areas of the
steering wheel are heated quicker
and to a higher temperature than the
other areas.
Heating is operational when the
engine is running and during an
Autostop.
Stop-start system 3 139.
Horn
Press j.
Windscreen wiper/washer
Windscreen wiperHI:fastLO:slowINT:interval wiping
or
automatic wiping with rain
sensorOFF:off
For a single wipe when the
windscreen wiper is off, press the
lever down to position 1x.
Do not use if the windscreen is frozen.
Switch off in car washes.
Adjustable wiper interval
Wiper lever in position INT.
Turn the adjuster wheel to adjust the
desired wipe interval:
short interval:turn adjuster
wheel upwardslong interval:turn adjuster
wheel downwards
Page 91 of 263

Instruments and controls89RBrake and clutch system 3 91-Operate pedal 3 91mElectric parking brake 3 91jElectric parking brake fault
3 91uAntilock brake system (ABS)
3 92RUpshift 3 92cPower steering 3 92)Lane departure warning 3 92aElectronic Stability Control off
3 92bElectronic Stability Control and
Traction Control system 3 92kTraction Control system off
3 93!Preheating 3 93%Diesel particle filter 3 93YAdBlue 3 93wTyre pressure monitoring
system 3 93IEngine oil pressure 3 93iLow fuel 3 94dImmobiliser 3 948Exterior light 3 94CHigh beam 3 94lHigh beam assist 3 94fAdaptive forward lighting 3 94>Fog light 3 95rRear fog light 3 95mCruise control 3 95AVehicle detected ahead 3 95hDoor open 3 95
Turn signal
O illuminates or flashes green.
Illuminates briefly
The parking lights are switched on.
Flashes
A turn signal or the hazard warning flashers are activated.
Rapid flashing: failure of a turn signal light or associated fuse, failure of turn
signal light on trailer.
Bulb replacement 3 196, Fuses
3 204.
Turn signals 3 121.
Seat belt reminder
Seat belt reminder on front seats X for driver's seat illuminates or
flashes red.
k for front passenger seat illuminates
or flashes red, when seat is occupied.
Illuminates
After the ignition has been switched
on until the seat belt has been
fastened.
Flashes
After having started the engine for a
maximum of 100 seconds until the
seat belt has been fastened.
Page 94 of 263

92Instruments and controls9Warning
Have the cause of the fault
remedied immediately by a
workshop.
Antilock brake system
(ABS)
u illuminates yellow.
Illuminates for a few seconds after the ignition is switched on. The system is
ready for operation when the control
indicator extinguishes.
If the control indicator does not
extinguish after a few seconds, or if it illuminates while driving, there is a
fault in the ABS. The brake system
remains operational but without ABS
regulation.
Antilock brake system 3 151.
Upshift R with the number of a higher gear is
indicated or pops up as a full page in
the Driver Information Centre when
upshifting is recommended for fuel
saving reasons.
EcoFlex drive assistant 3 95.
Power steering
c illuminates yellow.
Illuminates with power steering
reduced
Power steering is reduced due to
overheating of the system. Control
indicator extinguishes when the
system has cooled down.
Stop-start system 3 139.
Illuminates with power steering disabled
Failure in the power steering system.
Consult a workshop.
Lane departure warning) illuminates green or flashes yellow.
Illuminates green
System is switched on and ready to
operate.Flashes yellow
System recognises an unintended
lane change.
Electronic Stability Control off
n illuminates yellow.
The system is deactivated.
Electronic Stability Control and Traction Control system
b illuminates or flashes yellow.
Flashes
The system is actively engaged.
Engine output may be reduced and
the vehicle may be braked
automatically to a small degree.
Illuminates
A fault in the system is present. A
warning message appears in the
Driver Information Centre. Continued
driving is possible. The system is not
Page 95 of 263

Instruments and controls93operational. Driving stability,
however, may deteriorate depending on road surface conditions.
Have the cause of the fault remedied
by a workshop.
Electronic Stability Control (ESC) 3 155, Traction Control system (TC)
3 154.
Traction Control system off
k illuminates yellow.
The system is deactivated.
Preheating
! illuminates yellow.
Preheating is activated. Only
activates when outside temperature
is low.
Diesel particle filter % illuminates or flashes yellow.
The diesel particle filter requires
cleaning.Continue driving until %
extinguishes. If possible, do not allow engine speed to drop below
2000 rpm.
Illuminates
The diesel particle filter is full. Start cleaning process as soon as
possible.
Flashes
The maximum filling level of the filter
is reached. Start cleaning process
immediately to avoid damage to the
engine.
Diesel particle filter 3 143, Stop-start
system 3 139.
AdBlue
Y flashes yellow.
AdBlue level is low. Refill AdBlue soon to avoid prevention of the
engine start.
AdBlue 3 144.Tyre pressure monitoring
system
w illuminates or flashes yellow.
Illuminates
Tyre pressure loss. Stop immediately
and check tyre pressure.
Flashes
Fault in system or tyre without
pressure sensor mounted (e.g. spare
wheel). After 60-90 seconds the
control indicator illuminates
continuously. Consult a workshop.
Tyre pressure monitoring system3 211.
Engine oil pressure
I illuminates red.
Illuminates when the ignition is
switched on and extinguishes shortly
after the engine starts.
Page 105 of 263

Instruments and controls103● If a warning message appears inthe Driver Information Centre.
● If the parking assist detects an object.
● If unintended lane change occurs.
● If the diesel particle filter has reached the maximum filling
level.
When the vehicle is parked and/or the driver's door is opened
● With exterior lights on.
During an Autostop ● If the driver's door is opened.
Battery voltage When the vehicle battery voltage is
running low, a warning message will
appear in the Driver Information
Centre.1. Switch off immediately any electrical consumers which are
not required for a safe ride, e.g.
seat heating, heated rear window
or other main consumers.
2. Charge the vehicle battery by driving continuously for a while or
by using a charging device.
The warning message will disappear
after the engine has been started
twice consecutively without a voltage
drop.
If the vehicle battery cannot be
recharged, have the cause of the fault
remedied by a workshop.Vehicle personalisation
The vehicle's behaviour can be
personalised by changing the settings
in the Info-Display.
Some of the personal settings for
different drivers can be memorised
individually for each vehicle key.
Memorised settings 3 23.
Depending on vehicle equipment and
country-specific regulations, some of the functions described below may
not be available.
Some functions are only displayed or
active when the engine is running.
Personal settings in the
Graphic-Info-Display
CD 400plus/CD 400/CD 300
Page 128 of 263

126Climate controlClimate controlClimate control systems.............126
Heating and ventilation system 126
Air conditioning system ...........127
Electronic climate control system .................................... 129
Auxiliary heater ........................133
Air vents ..................................... 134
Adjustable air vents .................134
Fixed air vents ......................... 134
Maintenance .............................. 134
Air intake ................................. 134
Pollen filter ............................... 134
Air conditioning regular
operation ................................ 135
Service .................................... 135Climate control systems
Heating and ventilation system
Controls for: ● temperature
● air distribution
● fan speed
● demisting and defrosting
Heated rear window Ü 3 36.
Temperature
red:warmblue:coldHeating will not be fully effective until
the engine has reached normal
operating temperature.
Air distributions:to windscreen and front door
windowsM:to head area via adjustable air
ventsK:to foot well and windscreen
All combinations are possible.
Fan speed
Adjust the air flow by switching the fan to the desired speed.
Page 129 of 263
Climate control127Demisting and defrosting
●Press V: fan automatically
switches to higher speed, the air
distribution is directed towards
the windscreen.
● Set temperature control to warmest level.
● Switch on heated rear window Ü.
● Open side air vents as required and direct them towards the doorwindows.
Air conditioning system
In addition to the heating and
ventilation system, the air
conditioning system has controls for:
n:cooling4:air recirculation
Heated seats ß 3 55, Heated
steering wheel * 3 79.
Cooling n
Press n to switch on cooling. The
LED in the button illuminates to
indicate activation. Cooling is only
functional when the engine is running and climate control fan is switched on.
Press n again to switch off cooling.
The air conditioning system cools and
dehumidifies (dries) as soon as the
outside temperature is slightly above
the freezing point. Therefore
condensation may form and drip from under the vehicle.
Page 133 of 263

Climate control131
If the minimum temperature Lo is set,
the climate control system runs at
maximum cooling, if cooling n is
switched on.
If the maximum temperature Hi is set,
the climate control system runs at
maximum heating.
Note
If n is switched on, reducing the set
cabin temperature can cause the
engine to restart from an Autostop or inhibit an Autostop.
Stop-start system 3 139.
Demisting and defrosting the
windows V
●
Press V. The LED in the button
illuminates to indicate activation.
● Temperature and air distribution are set automatically and the fan
runs at high speed.
● Switch on heated rear window Ü.
● To return to previous mode: press V. To return to automatic
mode: press AUTO.
Setting of automatic rear window heating can be changed in the
Settings menu in the Info-Display.
Vehicle personalisation 3 103.
Note
If V is pressed while the engine is
running, an Autostop will be inhibited
until V is pressed again.
If s is pressed with the fan switched
on and the engine running, an
Autostop will be inhibited until s is
pressed again or until the fan is
switched off.
If V is pressed while the engine is
in an Autostop, the engine will restart automatically.
If s is pressed with the fan switched
on while the engine is in an
Autostop, the engine will restart
automatically.
Stop-start system 3 139.
Manual settings Climate control system settings can
be changed by activating the buttons
and rotary knobs as follows.
Changing a setting will deactivate the automatic mode.