122Climate controlSet the fan < to regulate the amount
of cooled air to be flown into the rear
passenger compartment.
Auxiliary heater Coolant heater
The engine-independent, fuel-
powered coolant heater provides
rapid heating of the engine coolant to
enable heating of the vehicle interior
without the engine running.9 Warning
Do not operate the system when
refuelling, when dust or
combustible vapours are present
or in enclosed spaces (e.g.
garage).
Before starting or programming the
system to start, turn the vehicle's
climate control system to heat, set the
air distribution to V and turn the fan
on.
Switch off when not required. Heating stops automatically after the
programmed runtime. It will also
cease to operate if the vehicle fuel
level drops too low.
During operation, power from the
vehicle battery is used. The driving
time should therefore be at least as
long as the heating time. For short
journey times, check the vehicle
battery regularly and recharge if
necessary.
To ensure efficient performance,
briefly operate the auxiliary heater
once a month.
Control units
The timer or remote control unit turns the system on and off, and is used to
programme specific departure times.Timer (Type A)1 Display:Displays preset, current
time or preset time,
temperature, Y and Ö2 l:Adjusts values up3 7:Long press: switch
heater on, short press:
turns display on or
confirms selection4 d:Long press: switch
heater off, short press:
turns display on or exit
menu5 k:Adjusts values down
Climate control123Remote control (Type A)1 Display:Displays preset, current
time or preset time,
temperature, Z, Ü , Y
and Ö2 7:Long press: switch heater on,
short press: turns display on
or confirms selection3 l:Adjusts values up4 d:Long press: switch heater off,
short press: turns display on
or exit menu5 k:Adjusts values downIf no buttons are pressed within
ten seconds the display automatically
turns off.
Remote control (Type A) fault
displaysINIT:automatic detection –
wait until automatic
detection is finishedNO
SIGNAL:no signal –
check heater fuseZ:poor signal –
move closerÜ:battery low –
replace batteryY:heater fault –
consult workshopAdd, AddE:system in learning
mode
Teach remote control (Type A)
If the vehicle battery is reconnected, the LED in the instrument panel
button illuminates and the system
configures the remote control menu
automatically. If the LED flashes,
select Add or AddE and confirm.
Additional remote control units may
also be configured. Press the button
until LED flashes, switch on the
remote control, select Add and
confirm.
AddE teaches the current remote
control unit exclusively and blocks all
previously configured units. Add
teaches up to four remote control
units, but only one unit can operate
the system at any one time.
Remote control (Type B)1 Display:Displays preset, current
time or preset time,
temperature, Z, Ü , Y
and Ö
124Climate control2 l:Adjusts values up3
OFF:Switch heater off, or press
Y and OFF simultaneously
to confirm selection4 Y:Switch heater on, or press Y
and OFF simultaneously to
confirm selection5 k:Adjusts values down
If no buttons are pressed within
30 seconds the display automatically
turns off.
9 Warning
When refuelling, switch off the
remote control unit as well as the
heater!
The remote control has a maximum
range of 1000 m. The range may be
reduced due to environmental
conditions and as the battery
becomes weaker.
Remote control (Type B) fault
displaysZ:poor signal – adjust positionFAIL:error during signal
transmission –
move closer or check heater
fuseÜ:battery low – replace battery
Teach remote control (Type B)
Up to four additional remote control
units may also be configured. During
additional teaching processes, the
oldest transmitter will be deleted each
time.
Remove the heater fuse for
5 seconds, then refit the fuse. Within
2–6 seconds press OFF for
1 second. Teaching is completed.
If the remote has not been used for a long period, press the OFF button six
times at intervals of 2 seconds, then
press and hold for another
2 seconds, then wait 2 minutes.
Manual control
Depending on version, the auxiliary
heater can also be switched on for the
last duration time or the default
duration 30 minutes, or cut-off
immediately, using the button on the
lower part of the instrument panel,
beside the steering wheel.
The LED in the button confirms
operation.
Battery replacement
Replace the battery when the range
of the remote control is reduced or when the battery charge symbol
flashes.
Climate control125Open the cover and replace the
battery (Type A: CR 2430, Type B:
2CR 11108, or equivalent), ensuring
the new battery is correctly installed
with the positive ( <) side facing the
positive terminals. Replace the cover securely.
Dispose of old batteries in
accordance with environmental
regulations.
Batteries do not belong in household
waste. They must be disposed of at
an appropriate recycling collection
point.
Operation (Type A)
Heating Y
Select Y in the menu bar and press
G to confirm. The predetermined
heating duration, e.g. L 30, flashes in
the display. The factory setting is 30 minutes.
Adjust the heating duration using k
or l and confirm. The value can be
set from ten to 120 minutes. Due to
the power consumption, note the
heating duration.
To switch off, select Y in the menu bar
again and press d.
Programming P
Up to three preset departure times
can be programmed, either during
one day or over one week.
● Select P in the menu bar and
press G to confirm.
● Select desired preset memory number P1, P2 or P3 and
confirm.
● Select F and confirm.
● Select weekday or weekday group and confirm.
● Select hour and confirm.
● Select minutes and confirm.
● Select Y and confirm.
● Select ECO or HIGH and confirm.
● Select duration and confirm.
● Press d to exit.Repeat the procedure to programme
the other preset memory numbers if
required.
To activate a desired preset memory
number select P1, P2 or P3, then
select On and confirm.
When a program is activated P and
Y will be displayed together.
To deactivate a preset memory,
select P1, P2 or P3, then select Off
and confirm.
Heating stops automatically
5 minutes after the programmed
departure time.
Notice
The remote control system features a temperature sensor which
calculates the runtime according to the ambient temperature and thedesired heating level (ECO or
HIGH). The system starts
automatically between five and
60 minutes prior to the programmed
departure time.
Set time and weekday Þ
If the vehicle battery is disconnected or its voltage is too low, the unit will
need to be reset.
126Climate control● Select F in the menu bar and
confirm.
● Select Þ in the menu bar and
confirm.
● Adjust using k or l to change
the hour and confirm.
● Adjust using k or l to change
the minutes and confirm.
● Press d to exit.
● Select F in the menu bar and
confirm.
● Select Mo in the menu bar and
confirm.
● Adjust using k or l to change
the weekday and confirm.
● Press d to exit.
Heating level
The preferred heating level for
programmed departure times can be set to either ECO or HIGH.
● Select Y in the menu bar and
confirm.
● Select ECO or HIGH and confirm.
● Press d to exit.Operation (Type B)
Heating Y
Select the operating mode Y, if
necessary.
● Press l three times.
● Press Y and OFF
simultaneously, Y flashes.
● Adjust using k or l to select Y.
● Press Y and OFF simultaneously
to confirm.
To switch on, press Y for
one second. The predetermined
heating duration, e.g. 30, is
displayed. The factory setting is
30 minutes.
The heating duration can be set in
increments of ten minutes. Due to the
power consumption, note the heating duration.
● Press l four times.
● Press Y and OFF
simultaneously, Y flashes.
● Adjust using k or l to select the
desired heating duration.
● Press Y and OFF simultaneously
to confirm.To switch off, press OFF.
Programming y
The system calculates the operating
time of the heater depending on the
temperature inside the vehicle.
● Press k twice.
● Press Y and OFF
simultaneously, y flashes.
● Adjust using k or l to select the
departure time.
● Press Y and OFF simultaneously
to confirm.
To switch on, press Y for one second ,
HTM is displayed.
Heating stops automatically after the
programmed departure time, or can
be manually switched off.
● Press k twice.
● Press OFF for one second, HTM
goes out.
Set time
If the vehicle battery is disconnected
or its voltage is too low, the time will need to be reset.
136Driving and operatingVehicle messages 3 102.
Notice
When the fast idle function is
activated, the stop-start system is
automatically deactivated and
cannot be reactivated by pressing
Î . LED in button illuminates to
indicate deactivation and a
corresponding message may
appear in the Driver Information Centre 3 101.
Idle speed control 3 134.
Depending on version, if the driver's door is opened or the driver's seat belt is unfastened, the stop-start system is
deactivated automatically, and the
engine is switched off. Restart engine by pressing START/STOP .
Power button 3 131.
Autostop
If the vehicle is at a low speed or at a standstill, activate an Autostop as
follows:
● depress the clutch pedal
● move the selector lever to neutral
● release the clutch pedalThe engine will be switched off while
the ignition stays on if the required
conditions are met.
An Autostop is indicated when Ï
illuminates in the instrument cluster
3 100.
During an Autostop, heating and brake performance will be
maintained. Brake assist, however, is
not available 3 147.
Caution
The power steering assist may be
reduced during an Autostop.
If you exit the vehicle while the engine is in an Autostop, a warning chime will
sound and a message " IGNITION
OFF " is displayed in the Driver
Information Centre as a reminder that
the engine is on standby and has not
been switched off.
Conditions for an Autostop
The stop-start system checks if each
of the following conditions is fulfilled,
otherwise an Autostop will be
inhibited and control indicator \ will
illuminate in the instrument cluster:
● the stop-start system is not manually deactivated
● the bonnet is fully closed
● the driver's door is closed or the driver's seat belt is fastened
● the vehicle battery is sufficiently charged and in good condition
● the engine is warmed up
● the engine coolant temperature is
not too high
● the outside temperature is not too
low or too high (e.g. below 0 °C
or above 35 °C)
Driving and operating137● the defrosting function is notactivated
● the climate control system does not inhibit an Autostop
● the brake vacuum is sufficient
● the self-cleaning function of the diesel particle filter is not active
3 139
● the Antilock brake system (ABS) 3 146, Traction Control system
(TC) 3 148 and Electronic
Stability Control (ESC) 3 149
ride control systems are not
actively engaged
● the vehicle has moved since the last Autostop
Otherwise an Autostop will be
inhibited.
Certain settings of the climate control
system may also inhibit an Autostop.
See " Climate control " chapter for
further information 3 118.
Immediately after motorway driving
an Autostop may be inhibited.
New vehicle running-in 3 131.Vehicle battery discharge protection
To ensure reliable engine restarts, several battery discharge protection
features are implemented as part of
the stop-start system.
Restart of the engine by the driver
Depress the clutch pedal to restart the
engine.
Notice
If any gear is selected, the clutch
pedal must be fully depressed to
restart the engine.
The engine restart may be interrupted
if the clutch pedal is released too
quickly while a gear is engaged.
If the engine does not restart first
time, depress clutch pedal fully again.
Alternatively, press button Î to
restart the engine while in an
Autostop.
Control indicator Ï 3 100
extinguishes in the instrument cluster when the engine is restarted.Restart of the engine by the stop-
start system
The selector lever must be in neutral to enable an automatic restart.
If one of the following conditions
occurs during an Autostop, the
engine will be restarted automatically
by the stop-start system:
● the vehicle battery is discharged
● the outside temperature is too low or too high (e.g. below 0 °C
or above 35 °C)
● the defrosting function is activated 3 118
● the brake vacuum is not sufficient
● the brake pedal is operated repeatedly
● the vehicle starts to move
An automatic engine restart may not
be possible if a door or the bonnet is
open.
If an electrical accessory, e.g. a
portable CD player, is connected to
the power outlet, a brief power drop
during engine restart may be
noticeable.
140Driving and operatingIf control indicator Z flashes, the
permitted emission limits may be
exceeded. Lift your foot off the
accelerator until Z stops flashing and
is steadily illuminated. Contact a
workshop immediately.
Malfunction indicator light 3 97.
AdBlue
General information
The selective catalytic reduction is a
method to substantially reduce the nitrogen oxides in the exhaust
emission. This is achieved by
injecting a Diesel Exhaust Fluid
(DEF) into the exhaust system.
The designation of this fluid is
AdBlue ®
. It is a non-toxic, non-
flammable, colourless and odourless
fluid which consists of 32% urea and
68% water.9 Warning
Avoid contact of your eyes or skin
with AdBlue.
In case of eye or skin contact,
rinse off with water.
Caution
Avoid contact of the paintwork with AdBlue.
In case of contact, rinse off with water.
AdBlue freezes at a temperature of
approx. -11 °C. As the vehicle is
equipped with an AdBlue pre-heater,
the emissions reduction at low
temperatures is ensured. The AdBlue
pre-heater works automatically.
AdBlue level indicator
The current AdBlue percentage
remaining can be shown in the Driver
Information Centre 3 101.