Page 185 of 514
184 Controls in detailGood visibilitySun visors
The sun visors protect you from sun glare
while driving.
Swing sun visor4 down when you
experience glare.1Mirror lamp
2Mirror cover
3Mounting
4Sun visor
To use the illuminated mirror, lift up
mirror cover2.If sunlight enters through a side window:
disengage sun visor from mounting3.
pivot sun visor to the side.
The sun visors are extendable.
Adjust the sun visors by pushing or
pulling in the direction of the arrows.
Warning!
G
Do not use the vanity mirror while driving.
Keep the mirrors in the sun visors closed
while vehicle is in motion. Reflected glare
can endanger you and others.
iIf sun visor4 is disengaged from
mounting3 with mirror cover2
open, mirror lamp1 will switch off.
!Close mirror cover2 (if open) before
you disengage the sun visor4 from
mounting3 and pivot it to the side.
Page 186 of 514

185 Controls in detail
Good visibility
Rear window defroster
The rear window defroster uses a large
amount of power. To keep the battery
drain to a minimum, switch off the
defroster as soon as the rear window is
clear. The defroster is automatically
deactivated after approximately
6 to 17 minutes of operation depending on
the outside temperature.Activating
Press buttonF or1 in the
climate control panel (
page 187) or
automatic climate control panel
(
page 197).
The indicator lamp on the button
comes on.
Deactivating
Press buttonF or1 again.
The indicator lamp on the button goes
out.
Warning!
G
Any accumulation of snow and ice should be
removed from the rear window before
driving. Visibility could otherwise be
impaired, endangering you and others.!If the rear window defroster switches
off too soon and the indicator lamp
starts flashing, this means that too
many electrical consumers are
operating simultaneously and there is
insufficient voltage in the battery. The
system responds automatically by
deactivating the rear window defroster.
As soon as the battery has sufficient
voltage, the rear window defroster
automatically switches on again.
Page 187 of 514
186 Controls in detailClimate control (CLK 350)
Page 188 of 514
187 Controls in detail
Climate control (CLK 350)
Canada only
USA only
Item
1
Left side air vent, adjustable
2
Thumbwheel for air volume control
for center air vents
3
Right side air vent, adjustable
4
Climate control panel
5
Right center air vent, adjustable
6
Thumbwheel for air volume control
for right side center air vent
7
Thumbwheel for air volume control
for left side center air vent
8
Left center air vent, adjustableiFor draft-free ventilation, move the
sliders for the side air vents1 and3
and center air vents5 and 8 to the
middle position.
Item
1
Air volume control
2
Left side temperature control
3
Right side temperature control
4
Air distribution control
5
Rear window defroster
6
AC cooling on/off
7
Air distribution and air volume
(automatic mode)
8
Air recirculation
9
Front defroster
Page 189 of 514

188 Controls in detailClimate control (CLK 350)The climate control is operational when-
ever the engine is running. You can oper-
ate the climate control system in either the
automatic or manual mode. The system
cools or heats the interior depending on
the selected interior temperature and the
current outside temperature.Nearly all dust particles, pollutants and
odors are filtered out before outside air en-
ters the passenger compartment through
the air distribution system.
The air conditioning will not engage (no
cooling) if the A/C mode is deactivated
(
page 194).
Warning!
G
When operating the climate control, the air
that enters the passenger compartment
through the air vents can be very hot or very
cold (depending on the set temperature).
This may cause burns or frostbite on unpro-
tected skin in the immediate area of the air
vents. Always keep sufficient distance be-
tween unprotected parts of the body and the
air vents. If necessary, use the air distribu-
tion control (
page 187) to direct the air to
air vents in the vehicle interior that are not
in the immediate area of unprotected skin.
Warning!
G
Follow the recommended settings for heat-
ing and cooling given on the following pag-
es. Otherwise the windows could fog up,
impairing visibility and endangering you and
others.
iSevere conditions (e.g. strong air
pollution) may require replacement of
the filter before its scheduled interval.
A clogged filter will reduce the air
volume to the interior.
If the vehicle interior is hot, ventilate
the interior before driving off, see
“Summer opening feature”
(page 252). The climate control will
then adjust the interior temperature to
the set value much faster.
Keep the air intake grille in front of the
windshield free of snow and debris.
Do not obstruct air flow by placing
objects on the air flow-through exhaust
slots below the rear window.
Page 190 of 514

189 Controls in detail
Climate control (CLK 350)
Deactivating the climate control system
Deactivating
Set air volume control1 (
page 187)
to position0.
Reactivating
Set air volume control1 (
page 187)
to any speed.Operating the climate control system
in automatic mode
Activating
Press buttonU (
page 187) while
the engine is running.
The indicator lamp on the button
comes on. The air volume and air distri-
bution are adjusted automatically.
Use temperature controls2 and3
(page 187) to separately adjust the
air temperature on each side of the
passenger compartment.
The temperature of the vehicle interior
is adjusted automatically.
Deactivating
Press buttonU (
page 187) again.
The indicator lamp on the button goes
out. The automatic operation of air vol-
ume and air distribution switches off.
iWhen the climate control system is de-
activated, the outside air supply and
circulation are also deactivated. Only
choose this setting for a short time.
Otherwise the windows could fog up.
iWhen operating the climate control
system in automatic mode, you will
only rarely need to adjust the tempera-
ture, air volume and air distribution.
In automatic mode, cooling with dehu-
midify is switched on. This function can
be switched off if necessary.
Page 191 of 514

190 Controls in detailClimate control (CLK 350)Setting the temperature
Use temperature controls2 and3
(page 187) to separately adjust the air
temperature on each side of the passenger
compartment. You should raise or lower
the temperature setting in small incre-
ments, preferably starting at 72°F (22°C).
The climate control will adjust to the set
temperature as fast as possible.
Increasing
Turn temperature control2
and/or3 (
page 187) slightly clock-
wise.
The climate control system will corre-
spondingly adjust the interior air tem-
perature.Decreasing
Turn temperature control2
and/or3 (
page 187) slightly coun-
terclockwise.
The climate control system will corre-
spondingly adjust the interior air tem-
perature.
Adjusting air distribution
Use air distribution control4
(page 187) to adjust the air distribution.
The following symbols are located on the
controls:
Press buttonU (
page 187).
The indicator lamp on the button goes
out. The automatic air distribution is
switched off. The air distribution is
controlled according to the selected
control setting
Turn air distribution control 4
(page 187) to the desired symbol.
Opening center and side air vents
Turn thumbwheels 2, 6and 7
(page 186) upward.
The side air vents1 and3 and cen-
ter air vents5 and 8 are open.
Closing center and side air vents
Turn thumbwheels 2, 6and 7
(page 186) downward.
The side air vents1 and3 and cen-
ter air vents5 and 8 are closed.
Symbol
Function
a
Directs air through the center,
side and rear passenger
compartment air vents
Z
Directs air to the windshield
and the side defroster vents
b
Directs air into the entire
vehicle interior
Y
Directs air to the footwells
Page 192 of 514

191 Controls in detail
Climate control (CLK 350)
Adjusting air volume
Six blower speeds are available.
Press buttonU (
page 187).
The indicator lamp on the button goes
out. The automatic air volume control
is switched off. The air volume is con-
trolled according to the currently se-
lected control setting.
Use the air volume control1
(page 187) to adjust the air volume.
Front defroster
You can use this setting to defrost the
windshield, for example if it is iced up.
You can also defog the windshield and the
side windows.
Activating
Press buttonPor0
(page 187).
The indicator lamp on the button
comes on.The air conditioning switches
automatically to the following functions:
cooling on to dehumidify
maximum blowing and heating
power
air flows onto the windshield and
the front side windows
the air recirculation mode is
switched off
Deactivating
Press buttonP or0
(page 187) again.
The indicator lamp on the button goes
out. Defrosting is turned off.
iKeep this setting selected only until the
windshield or the side windows are
clear again.
iThe cooling remains switched on.