Activating/deactivating rear-
compartment climate control via the
control panel X
Turn the key to position 2in the ignition
lock.
Vehicle with rear-compartment heating/
rear-compartment air conditioning
X To switch on/off: press the001Bswitch.
If the indicator lamp in the butto nlights up,
the rear-compartment heating/rear-
compartmen tair conditioning is switched
on. Switching the cooling with air
dehumidification function on/off
Important information If you switch off the "Cooling with air
dehumidification" function, the air inside the
vehicle will not be cooled (in warm weather)
or dehumidified. The windows could fog up
more quickly.
The cooling with air dehumidification function
is only available when the engine is running.
The air inside the vehicle is cooled and
dehumidified according to the temperature
selected.
Condensatio nmay appear on the underside
of the vehicle when in cooling mode. This is
normal and not a sign that there is a
malfunction.
Switching on/off Vehicle with air conditioning
X
Press the 0008button.
If the indicator lamp in the butto nlights up,
cooling with air dehumidification is
switched on. Setting the temperature
Increasing/reducing temperature in
the front compartment via the control
panel Only change the temperature in small
increments. Start at the center position, or at
22 †.
X
Switch on climate control (Y page 112).
X Turn temperature control 0005clockwise to
increase or counterclockwise to reduce the
temperature (Y page 110).
Increasing/reducing temperature in
the rear compartment via the control
panel Only change the temperature in small
increments.
X
Switch on climate control (Y page 112).
X Turn rear-compartment temperature
control 0026(Ypage 111) or rear-
compartment air-conditioning system 0006
(Y page 112) clockwise to increase or
counterclockwise to reduce the
temperature.
i Vehicles with additional air conditioning
and heating in the rear compartment: if you
set the temperature control to the center
position, only one of the two climate
control systems works in the rear
compartmen tand in air-recirculation mode
(Y page 116). Setting the air distribution
Ai rd istribution settings The air distribution symbols have the
following meanings:
0027
Directs air through the center
and side air vents
000B0021 Directs air to the windshield and
the air vents Operating the climate control system
113Climate control
Rear window defroster
Rear window defroste
rswitch
The rear window defroster consumes a lot of
power. You should therefore switch it off as
soon as the window is clear .The rear window
defroster otherwise switches off
automatically after 12 minutes.
X Start the engine.
X To switch on/off: press the0019switch.
The indicator lamp in the 0019button
comes on when the rear window defroster
is switched on.
If the indicator lamp in the 0019rear window
defroster button flashes, the on-board
voltage is too low. The rear window defroster
has switched off prematurely or cannot be
activated.
X Switch off any consumers that are not
required, e.g. reading lamps or interior
lighting.
If enough on-board voltage is available again
within 30 seconds, the rear window defroster
automatically switches on again. It otherwise
remains switched off. Switching air-recirculation mode on/
off
Important safety notes When you switch on air-recirculation mode,
the windows could fog up more quickly, in
particular at low outside temperatures. Only switch on air-recirculation mode for a short
time.
You can deactivate the intake of fresh air if
unpleasant odors enter the vehicle from
outside. The air inside the vehicle will only be
circulated.
Heating/air-conditioning system
Air-recirculation mode switches off
automatically after about 10to 30 minutes,
depending on the outside temperature.
X
Switch on climate control (Y page 112).
X To switch on/off: press the0022switch.
If the indicator lamp in the 0022button
lights up, air-recirculation mode is
activated.
Rear-compartment heating/rear-
compartment air conditioning On vehicles with a rear-compartment heating
and air-conditioning system, you can
activate/deactivate air-recirculation mode
for the rear-compartment climate control.
X Switch on climate control (Y page 112).
X To activate: set the temperature control of
rear-compartment heating
0026(Y page 111) or rear-compartment air
conditioning system 0006(Ypage 112) to the
center position.
Only one of the two climate control
systems in the rear compartment is
activated and is in air-recirculation mode.
X To deactivate: turn the temperature
control of rear-compartment heating
0026(Y page 111) or rear-compartment air-
conditioning system 0006(Ypage 112)
clockwise or counterclockwise. Only
change the temperature in small
increments. 116
Operating the climate control systemClimate control
X
To open: for the left-hand side of the
vehicle, tur nthumbwheel 0005or for the
right-hand side of the vehicle,
thumbwheel 0006of the air vents clockwise.
X To close: for the left-hand side of the
vehicle, turn thumbwheel 0005or for the
right-hand side of the vehicle,
thumbwheel 0006of the air vents counter-
clockwise. Adjusting the air vents in the roof duct
! Always leave at least one air vent open.
If the rear-compartment air conditioning is
switched on and all the air vents are closed,
the air-conditioning system may be
damaged. On vehicles with rear-compartment air
conditioning, adjustable air vents are
integrated into the roof duct.
X
To adjust the airflow: open or close the
air flap in air vents 0005as needed.
X To adjust the air distribution: turn air
vent 0005to the desired position. Operating the auxiliary heating
system
Important safety notes
G
DANGER
If the exhaust pipe is blocked or adequate
ventilation is not possible, poisonous gases such as carbon monoxide (CO) may enter the
vehicle. This is the case, for example in
enclosed spaces or if the vehicle gets stuck
in snow. There is a risk of fatal injury.
Switch the auxiliary heating off in enclosed
spaces without extraction systems, e.g. in
garages. If the vehicle is stuck in snow and
you have to leave the auxiliary heating
running, keep the exhaust pipe and the area
around the vehicle free of snow. To ensure an
adequate supply of fresh air, open a window
on the side of the vehicle that is not facing
into the wind. G
WARNING
When the auxiliary heating is switched on,
parts of the vehicle can become very hot, e.g.
the exhaust system. If flammable materials
such as leaves, grass or twigs remain in
contact with hot parts of the exhaust system
for a prolonged period, they could ignite.
There is a risk of fire.
When the auxiliary heating is switched on,
make sure that no flammable material can
come into contact with hot vehicle
components.
! Switch on the auxiliary heating system at
least once a month for approximately
10 minutes. The auxiliary heating could
otherwise be damaged.
! Make sure that the flow of hot air is not
blocked. The auxiliary heating will
otherwise overheat and switch off.
Your vehicle may be equipped with either an
auxiliary hot-water heater or an auxiliary
warm-air heater. Adjustment and operation of
the:
R hot-water auxiliary heater is done via the
on-board computer and with the auxiliary
heating button in the control panel
(Y page 119) or with the remote control
(Y page 121).
R auxiliary warm-air heater is done via the
timer above the overhead control panel
(Y page 122). 118
Operating the auxiliary heating systemClimate control
X
Press the 0003or0006 button until the
0001 symbol in menu bar 0006flashes.
X Press the 000Abutton.
In program column 0005, the day selected
flashes.
X Press the 0003or0006 button to set the
desired day.
X Press the 000Abutton.
The day selected is stored. The hour setting
of the clock flashes.
X In the same way, set the hour and
subsequently the minutes, then confirm by
pressing the 000Abutton.
The time is stored. Program column 0005
disappears and the operating duration
flashes.
i The operating duration set is the default
setting for immediate heating mode. You
can set the operating duration from 10 to
120 minutes or activate continuous
operation.
X Using the 0003or0006 button, set the
minute value or select the 0005symbol for
continuous operation.
X Press the 000Abutton.
The operating duration is stored. The time
is shown.
Activating/deactivating immediate
heating mode X
To switch on: press the0003or0006
button until the 0020symbol in the menu
bar flashes.
X Press the 000Abutton.
The operation duration flashes in the
display.
i You can preset the default value that is
shown (Y page 123).
X Using the 0003or0006 button, set the
minute value (10 – 120) or select the
0005 symbol for continuous operation. X
Press the 000Abutton.
Immediate heating mode is activated. The
time and the 0020symbol appear.
X To switch off: press the0003or0006
button until the 0020symbol flashes in the
menu bar, and then press the 000Abutton.
Immediate heating mode is deactivated.
The 0020 symbol disappears.
The auxiliary heating operates for another
two minutes and then switches off
automatically.
i If you switch off the ignition while
immediate heating mode (operating
duration 10– 120 minutes) is active,
immediate heating mode is also switched
off. The auxiliary heating operates for
another two minutes and then switches off
automatically.
If you have set continuous operation as the
operating duration and you switch off the
ignition, the auxiliary heating switches off
automatically after about 15 minutes .If, in
the remaining time, the ignition is switched
on again, continuous operation of the
auxiliary heating continues.
Setting the preselection time G
WARNING
The auxiliary heating must not be operated if
there are highly flammable substances
nearby or in enclosed spaces without an
extraction system. Make sure that the
auxiliary heating is not switched on
automatically by the timer in such places. If
this possibility exists, deactivate the
respective programmed time.
You can set three preselectio ntimes using
the timer.
Observe that when setting the preselection
time, this does not correspond to the switch-
on time but to the switch-off or departure
time. The auxiliary heatin gsystem starts up
automatically and runs fo rthe operating
duration set prior to departure. 124
Operating the auxiliary heating systemClimate control
At an outside temperature of up to
39 ‡(4 †) the fuel-fired heate
rbooster
system heats the vehicle interior as quickly
as possible when the engine is running.
The auxiliary heating automatically switches
to heater booster mode after the engine is
started.
At an outside temperature above 39 ‡(4 †)
the auxiliary heating system and the heater
booster function switch off automatically.
If you switch off the engine without switching
off the heater booster function, the system
will be switched on the next time the engine
is started (memory function).
i Switch the auxiliary heating on or off with
the 0020 button (Y page 119).
X To switch on/off: press the0013switch.
If the indicator lamp in the button lights up,
the heater booster function is switched on.
After switching off, the auxiliary heating
operates for about another three minutes and
then switches off automatically. Replacing the remote control battery
G
WARNING
Batteries contain toxic and corrosive
substances. If batteries are swallowed, it can
result in severe health problems. There is a
risk of fatal injury.
Keep batteries out of the reach of children. If
a battery is swallowed, seek medical attention
immediately. H
Environmental note Batteries contain dangerous
substances. It is against the
law to dispose of them with
the household rubbish. They
must be collected separately
and recycled to protect the
environment.
Dispose of batteries in an
environmentally friendly
manner
.Take discharged
batteries to a qualified
specialist workshop or a
special collectio npoint for
used batteries.
If the indicator lamp on the remote control
flashes red rapidly, the remote control battery
is discharged. You should replace the remote
control battery.
You need a battery of the type CR2430, which
can be obtained at any qualified specialist
workshop. X
Remove battery cover 0006using a suitable
implement, e.g. a coin, by turning it
counter-clockwise.
X Check the seal on battery cover 0006for
damage and, if necessary, replace.
X Remove old batteries 0026.
X Insert new, clean battery 0026into the
battery tray with the positive pole facing
upwards. Use a lint-free cloth to do so. 126
Operating the auxiliary heating systemClimate control
X
Position battery cover 0006so that mark 0005
on the raised area points between two
recesses 0025.
X Turn battery cover 0006using a suitable
implement, e.g. a coin, clockwise to the
stop.
X Check all the functions of the remote
control (Y page 121). Operating the auxiliary heating system
127Climate control Z
The fuel filler flap is beside the frontl
eft-hand
door when viewed in the direction of travel. It
is only possible to open the fuel filler flap
when the fron tdoor is open.
X Remove the key from the ignition lock.
X Switch off the auxiliary heating system
(Y page 118).
X Open the front left-hand door first, and then
the fuel filler flap.
X Close all vehicle doors to prevent fuel
vapors from entering the vehicle.
X Turn fuel filler cap 0006counter-clockwise,
remove it and let it hang from strap 0005.
X Completely insert the filler neck of the fuel
pump nozzle into the tank and refuel.
X Only fill the tank until the pump nozzle
switches off. Fuel may otherwise leak out.
X Replace tank filler cap 0006and turn
clockwise.
You will hear a click when the fuel filler cap
is closed fully.
X Open the front left-hand door first, and then
close the filler flap. Problems with the fuel and fuel tank
If your vehicle is losing fuel, the fuel lines or
the fuel tank are defective.
X Turn the key to position 0in the ignition
lock immediately and remove it.
X Do not restart the engine under any
circumstances.
X Consult a qualified specialist workshop. Diesel Exhaust Fluid (DEF)
Important safety notes H
Environmental note
Dispose of DEF in an environmentally
responsible manner.
! Only use DEF in accordance with
ISO 22241. Never mix DEF with additives or thin it with tap water. The exhaust gas
aftertreatmen
tmay otherwise be
damaged.
Observe the MB Specifications for Service
Products, Sheet 352.0.
Damage that results from the use of
additives or tap wate rleads to the loss of
the New Vehicle Limited Warranty.
! If DEF comes into contact with a painted
or aluminum surface, wash the surface off
immediately with plenty of water.
! DEFi s not a diesel additive and must not
be mixed with fuel in the tank. Even small
amounts of DEF can cause engine damage.
Damage that results from the blending of
DEF will not be covered by the New Vehicle
Limited Warranty.
The exhaust gas aftertreatmentr equires a
reducing agent, Diesel Exhaust Fluid (DEF), in
order to function correctly.
When opening the DEF tank filler cap at high
outside temperatures, ammonia vapors may
escape.
Ammonia vapors have a pungent smell and
primarily cause irritation of the:
R skin
R mucous membranes
R eyes
You may experience a burning sensation in
your eyes, nose and throat, as well as
coughing and watering of the eyes.
Do not inhale ammonia vapors. Avoid contact
with DEF.
Do not allow DEF to come intod irectcontact
with your skin; it is hazardous to your health.
Rinse any affected areas off with plenty of
clean water. Consult a doctor if necessary.
i If the DEFr eserve has fallen below the
reserve range, add at least 2.0 US gal
(7.6 l) of DEF at the latest after receiving
the second warning message
(Y page 178). Refueling
143Driving and parking Z
i
If you switch off the engine at a low
outside temperature and add DEF, restart
the engine after refueling. If you leave the
vehicle parked withou trestarting the
engin eand the DEF freeze sin the DEF tank,
the on-board compute rwill only be able to
register the new fill level after a defrosting
period of up to 60 minutes. During this
time, you may not be able to start the
engine.
You will find further information on DE Finthe
"Service products" section (Y page 317).
Refueling procedure DEF filler neck in the engine compartment
X
Remove the key from the ignition lock.
X Switch off the auxiliary heating system
(Y page 125).
X Open the hood.
X Close all vehicle doors so that no ammonia
vapors can enter the vehicle.
i Do not inhale any ammonia vapor which
may escape when you unscrew cap 0005.
Ammonia vapors have a pungent odor.
However, they are neither toxic nor
hazardous to health in this concentration.
X Turn cap 0005counter-clockwise and remove
it.
X Only fill up the DEF tank until the DEF level
is visible in the filler neck.
X Replace DEF filler neck cap 0005on the filler
neck and turn clockwise. You will hear a click when cap
0005is fully
closed.
DEF filler neck on the right-hand vehicle
side The DEF reservoir on the right-hand side of the
vehicle (example: Chassis Cab)
Fuel filler cap
X
Remove the key from the ignition lock.
X Switch off the auxiliary heating system
(Y page 125).
X Remove tool 0023for unlocking tank filler
cap 0006from the footwell on the co-driver's
side (Y page 264).
X Close all vehicle doors so that no ammonia
vapors can enter the vehicle.
X Pull cover 0025up, turn 90° and release.
X Insert tool 0023into hole 0026of tank filler
cap 0006.
i Do not inhale any ammonia vapor that
may escape when you unscrew tank filler
cap 0006.A mmonia vapors have apungent
odor .However, they are neither toxic nor
hazardous to health in this concentration. 144
RefuelingDriving and parking