2014 MERCEDES-BENZ M-Class Owner's Manual

Installing
awiper blade
X Place new wiper blade 0003onto wiper
arm 0002.
X Hold wiper arm 0002and press wiper
blade 0003in the opposite direction to the
arrow until it engages.
X Make sure that wiper blade 0003is seated
correctly.
X Position wiper blade 0003parallel to wiper
arm 0002.
X Fold wiper arm 0002back onto the rear
window. Windshield wipers
135Lights and windshield wipers Z

Problems with the windshield wipers
Problem Possible causes/consequences and
0001 Solutions
The windshield wipers
are jammed. Leaves or snow, for example, may be obstructing the windshield
wiper movement.T
he wiper motor has been deactivated.
X For safety reasons, you should remove the SmartKey from the
ignition lock.
or
X Switch off the engine using the Start/Stop button and open the
driver's door.
X Remove the cause of the obstruction.
X Switch the windshield wipers back on. The windshield wipers
fail completely. The windshield wiper drive is malfunctioning.
X
Select another wiper speed on the combination switch.
X Have the windshield wipers checked at a qualified specialist
workshop. 136
Windshield wipersLights and windshield wipers

Useful information
............................138
Overview of climate control sys-
tems ................................................... 138
Operating the climate control sys-
tems ................................................... 144
Setting the air vents .........................152 137Climate control

Useful information
i This Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
possible. Please note that your vehicle may
not be equipped with all features
described. This also applies to safety-
related systems and functions.
i Read the information on qualified
specialist workshops: (Y page 28).Overview of climate control systems
Important safety notes
Observe the settings recommended on the
following pages. The windows could
otherwise fog up.
To preven tthe windows from fogging up:
R switch off climate control only briefly
R switch on air-recirculation mode only
briefly
R switch on the cooling with air
dehumidification function
R switch on the defrost windshield function
briefly, if required
Climate control regulates the temperature
and the humidity in the vehicle interior and
filters undesirable substances out of the air.
Climate control can only be operated when
the engine is running. Optimum operation is
only achieved with the side windows and roof
closed.
The residual heat function can only be
activated or deactivated with the ignition
switched off (Y page 151).
i Ventilate the vehicle for a brief period
during warm weather, e.g. using the
convenience opening feature (Y page 95).
This will speed up the cooling process and
the desired vehicle interior temperature
will be reached more quickly. i
The integrated filter can filter out most
particles of dust, and completely filters out
pollen. Aclogged filter reduces the amount
of air supplied to the vehicle interior .For
this reason, you should always observe the
interval for replacing the filter, which is
specified in the Maintenance Booklet .As it
depends on environmental conditions, e.g.
heavy air pollution, the interval may be
shorter than stated in the Maintenance
Booklet.
i It is possible that the dehumidification
function of the climate control system may
be activated automatically an hour after the
SmartKey has been removed. The vehicle
is then ventilated for 30 minutes. 138
Overview of climate control systemsClimate control

Control panel for dual-zone automatic climate control
USA only
Fron tcontrol panel
0002 To set the temperature, left (Y page 147)
0003 To defrost the windshield (Y page 149)
0023 To switch maximum cooling on/off (Y page 149)
0022 To switch cooling with air dehumidificatio non/off (Y page 145)
0020 To switch the rea rwindow defroster on/off (Y page 150)
0021 To set the temperature, right (Y page 147)
0014 To activate/deactivate air-recirculation mode (Y page 151)
0015 To set the air distribution (Y page 148)
0016 To increase the airflow (Y page 148)
0017 To reduce the airflow (Y page 148)
0018 To switch climate control on/off (Y page 144)
001A To set climate control to automatic (Y page 146) Overview of climate control systems
139Climate control

Canada only
Fron tcontrol panel
0002 To set the temperature, left (Y page 147)
0003 To defrost the windshield (Y page 149)
0023 To switch the ZONE function on/off (Y page 149)
0022 To activate/deactivate cooling with air dehumidificatio n(Ypage 145) or activate/
deactivate the residual heatin gfunction ( Ypage 151)
0020 To switch the rear window defroste ron/off (Y page 150)
0021 To set the temperature, right (Y page 147)
0014 To activate/deactivate air-recirculation mode (Y page 151)
0015 To set the ai rdistribution (Y page 148)
0016 To increase the airflow (Y page 148)
0017 To reduce the airflow (Y page 148)
0018 To switch climate control on/off (Y page 144)
001A To set climate control to automatic (Y page 146)Rear control panel
0002 To set rear-compartment climate control to automatic
0003 To switch rear-compartment climate control on/off 140
Overview of climate control systemsClimate control

0023
To direct the airflow through the rear air vents
0022 To direct the airflow through the footwell vents Information about using dual-zone
automatic climate control
The following contains notes and
recommendations on optimum use of dual-
zone automatic climate control.
R Activate climate control using the 0006and
0007/0005 buttons. The indicator lamps in
the 0006 and0007/0005 buttons light up.
R Set the temperature to 72 ‡ (22 †).
R Only use the "Windshield defrosting"
function briefly until the windshield is clear
again.
R Only use air-recirculation mode briefly, e.g.
if there are unpleasant outside odors or
when in a tunnel. The windows could
otherwise fog up, since no fresh air is drawn
into the vehicle in air-recirculation mode.
R Use the ZONE function to adopt the
temperature settings on the driver's side
for the front-passenger side as well. The
indicator lamp above the 0004button goes
out.
R Vehicles with COMAND: if you change the
settings of the climate control system, the
climate status display appears for
approximately three seconds at the bottom
of the screen in the COMAND display .See
also the separate COMAND operating
instructions. You will see the current
settings of the various climate control
functions.
During automatic engine switch-off, the
climate control only operates at a reduced
capacity. If you require the full climate control
output, you can switch off the ECO start/stop
function by pressing the ECO button
(Y page 163). Overview of climate control systems
141Climate control

Control panel for 3-zone automatic climate control
USA only
Fron tcontrol panel
0002 To set the temperature, left (Y page 147)
0003 To defrost the windshield (Y page 149)
0023 To switch maximum cooling on/off (Y page 149)
0022 To switch cooling with air dehumidificatio non/off (Y page 145)
0020 To switch the rea rwindow defroster on/off (Y page 150)
0021 To set the temperature, right (Y page 147)
0014 To switch the ZONE function on/off (Y page 149)
0015 To switch climate control on/off (Y page 144)
0016 To set the air distribution (Y page 148)
0017 To increase the airflow (Y page 148)
0018 To reduce the airflow (Y page 148)
001A Display
001B To adjust the climate mode settings (Y page 147)
001C To activate/deactivate air-recirculation mode (Y page 151)
001D To set climate control to automatic (Y page 146)
Rear control panel
001E To increase the airflow (Y page 148)
001F To set the temperature (Y page 147)
0024 To set rear-compartment climate control to automatic (Y page 146)
0025 To direc tthe airflow through the rear air vents (Y page 148)
0026 To direct the airflow through the footwell vents (Y page 148)142
Overview of climate control systemsClimate control