Page 131 of 350
Useful information............................130
Overview of climate control sys-
tems ................................................... 130
Operating the climate control sys-
tems ................................................... 133
129
Climate control
Page 132 of 350

Useful information
i
This Operator's Manual describes all
models and all standard and optional equip-
ment 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.
iRead the information on qualified special-
ist workshops (
Ypage 31).
Overview of climate control systems
General notes
Observe the settings recommended on the
following pages. The windows could other-
wise fog up.
To prevent the windows from fogging up:
Rswitch off climate control only briefly
Rswitch on air-recirculation mode only
briefly
Rswitch on the cooling with air dehumidifi-
cation function
Rswitch 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 acti-
vated or deactivated if the ignition is switched
off (see the Digital Operator's Manual, key-
word "Residual heat").
iVentilate the vehicle for a brief period
during warm weather, e.g. using the con-
venience opening feature (see the Digital
Operator's Manual, keyword "Convenience
opening"). This will speed up the cooling process and the desired interior tempera-
ture will be reached more quickly.
iThe integrated filter filters out most par-
ticles of dust and soot and completely fil-
ters out pollen. It also reduces gaseous pol-
lutants and odors. A clogged 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.
iIt is possible that the residual heat func-
tion may be activated automatically an hour
after the SmartKey is removed. The vehicle
is then ventilated for 30 minutes to dry the
automatic climate control.
130Overview of climate control systems
Climate control
Page 133 of 350
Control panel for dual-zone automatic climate control
Canadaonly
:
Switches air-recirculation mode on/off
;Defrosts the windshield
=Switches the ZONE function on/off
?Display
ASets climate control to automatic
BSwitches cooling with air dehumidification on/off
CSwitches the rear window defroster on/off
DActivates/deactivates the air conditioning
ESets the temperature, right
FSets the air distribution
GSets the airflow
HSets the temperature, left
US Aonly
:
Sets climate control to automatic
;Defrosts the windshield
=Switches the ZONE function on/off
?Switches air-recirculation mode on/off
ASwitches the maximum cooling MAX COOL on or off
BSwitches cooling with air dehumidification on/off
CSwitches the rear window defroster on/off
Overview of climate control systems131
Climate control
Page 134 of 350
DActivates/deactivates the air conditioning
ESets the temperature, right
FSets the air distribution
GSets the airflow
HSets the temperature, left
IDisplay
Control panel for 3-zone automatic climate control
Canada only
Front control panel
:Sets climate control to automatic
;Defrosts the windshield
=Switches the ZONE function on/off
?Display
ASwitches air-recirculation mode on/off
BSwitches the residual heat on or off
CSwitches cooling with air dehumidification on/off
DSwitches the rear window defroster on/off
EActivates/deactivates the air conditioning
FSets the temperature, right
GAdjusts the climate mode settings
HSets the airflow
ISets the air distribution
JSets the temperature, left
132Overview of climate control systems
Climate control
Page 135 of 350
Rear control panel
KIncreases the temperature
LDisplay
MIncreases the airflow
NReduces the airflow
OReduces the temperature
Operating the climate control sys-
tems
In the Digital Operator's Manual you will find
information on the following topics:
RSwitching climate control on/off
RActivating/deactivating cooling with air
dehumidification
RSetting climate control to automatic
RAdjusting the climate mode settings
RSetting the temperature
RSetting the air distribution
RSetting the airflow
RSwitching the ZONE function on/off
RDefrosting the windshield
RMAX COOL maximum cooling
RDefrosting the windows
RSwitching the rear window defroster on/off
RActivating/deactivating air-recirculation
mode
RActivating/deactivating the residual heat
function
RSetting the air vents
Operating the climate control systems133
Climate control
Page 220 of 350
Below it you will see the main display field.
The climate control status display is briefly
displayed when you operate the climate con-
trol system.
Cleaning instructions
!Do not touch the display. The display has
a very sensitive high-gloss surface; there is
a risk of scratching. If you have to clean the
screen, however, use a mild cleaning agent
and a soft, lint-free cloth.
The display must be switched off and have
cooled down before you start cleaning. Clean
the display screen, when necessary, with a
commercially available microfiber cloth and
cleaning agent for TFT/LCD displays. Do not
apply pressure to the display surface when
cleaning it, as this could cause irreversible
damage to the display. Then, dry the surface
with a dry microfiber cloth.
Avoid using alcoholic thinners, gasoline or
abrasive cleaning agents. These could dam-
age the display surface.
218Audio 20/COMAND operating system
Audio 20/COMAND
Page 304 of 350

Example:
RTread wear grade:200
RTraction grade:AA
RTemperature grade: A
All passenger car tires must conform to the
statutory safety requirements in addition to
these grades.
iThe actual values for tires are vehicle-
specific and may deviate from the values in
the illustration.
Treadwear
The tread wear grade is a comparative rating
based on the wear rate of the tire when tested
under controlled conditions on a specified
U.S. government course. For example, a tire
graded 150 would wear one and one-half
times as well on the government course as a
tire graded 100.
The relative performance of tires depends
upon the actual conditions of their use, how-
ever, and may depart significantly from the
norm due to variations in driving habits, ser-
vice practices and differences in road char-
acteristics and climate.
Traction
GWARNING
The traction grade assigned to this tire is
based on straight-ahead braking traction
tests, and does not include acceleration, cor-
nering, hydroplaning, or peak traction char-
acteristics.
!Avoid wheelspin. This can lead to damage
to the drive train.
The traction grades – from highest to lowest –
are AA, A, B and C. Those grades represent
the tire's ability to stop on wet pavement as
measured under controlled conditions on
specified government test surfaces of asphalt
and concrete. A tire marked C may have poor
traction performance. The safe speed on a wet, snow covered or icy
road is always lower than on dry road surfa-
ces.
You should pay special attention to road con-
ditions when temperatures are around freez-
ing point.
Mercedes-Benz recommends a minimum
tread depth of
ãin (4 mm) on all four winter
tires. Observe the legally required minimum
tire tread depth (
Ypage 289). Winter tires can
reduce the braking distance on snow-covered
surfaces in comparison with summer tires.
The braking distance is still much further than
on surfaces that are not icy or covered with
snow. Take appropri ate ca
re when driving.
Further information on winter tires (M+S
tires) can be found in the Digital Operator's
Manual.
Temperature
GWARNING
The temperature grade for this tire is estab-
lished for a tire that is properly inflated and
not overloaded. Excessive speed, underinfla-
tion, or excessive loading, either separately or
in combination, can cause excessive heat
build-up and possible tire failure.
The temperature grades are A (the highest), B,
and C, representing the tire's resistance to
the generation of heat and its ability to dissi-
pate heat when tested under controlled con-
ditions on a specified indoor laboratory test
wheel. Sustained high temperature can cause
the material of the tire to degenerate and
reduce tire life, and excessive temperature
can lead to sudden tire failure. The grade C
corresponds to a level of performance which
all passenger car tires must meet under the
Federal Motor Vehicle Safety Standard No.
109. Grades B and A represent higher levels
of performance on the laboratory test wheel
than the minimum required by law.
302All about wheels an d tires
Wheels and tires
Page 339 of 350

Engine number
:Emission control information plate,
including the certification of both federal
and Californian emissions standards
;Engine number (stamped into the crank-
case)
=VIN (on the lower edge of the windshield)
Service products and filling capaci-
ties
Important safety notes
GWARNING
Service products may be poisonous and haz-
ardous to health. There is a risk of injury.
Comply with instructions on the use, storage
and disposal of service products on the labels
of the respective original containers. Always
store service products sealed in their original
containers. Always keep service products out
of the reach of children.
HEnvironmental note
Dispose of service products in an environ-
mentally responsible manner.
Service products include the following:
RFuels
RExhaust gas aftertreatment additives, e.g.
DEF
RLubricants (e.g. engine oil, transmission oil)
RCoolant
RBrake fluid
RWindshield washer fluid
RClimate control system refrigerant
Components and service products must be
matched. Only use products recommended
by Mercedes-Benz. Damage which is caused
by the use of products which have not been
recommended is not covered by the
Mercedes-Benz warranty or goodwill ges-
tures. They are listed in this Mercedes-Benz
Operator's Manual in the appropriate section.
Information on tested and approved products
can be obtained at an authorized Mercedes-
Benz Center or on the Internet at
http://bevo.mercedes-benz.com.
You can recognize service products approved
by Mercedes-Benz by the following inscrip-
tion on the containers:
RMB-Freigabe (e.g. MB-Freigabe 229.51)
RMB Approval (e.g. MB Approval 229.51)
Other designations or recommendations indi-
cate a level of quality or a specification in
accordance with an MB Sheet Number (e.g.
MB 229.5). They have not necessarily been
approved by Mercedes-Benz.
Other identifications, for example:
R0 W-30
R5 W-30
R5 W-40
Fuel
Important safety notes
GWARNING
Fuel is highly flammable. If you handle fuel
incorrectly, there is a risk of fire and explo-
sion.
You must avoid fire, open flames, creating
sparks and smoking. Switch off the engine
and, if applicable, the auxiliary heating before refueling.
Service products and filling capacities337
Technical data
Z