2005 MERCEDES-BENZ E320CDI Air control

201 Controls in detail
Dual-zone automatic climate control
Air conditioning
The air conditioning is operational while
the engine is running and cools the interior
air to the temperature set by the operator.Deactivating
It is possible to deactivate the air condi-
tioning (cooling) function of the climate
control system. The air in the vehicle will
then no longer be cooled or dehumidified.
Climate control panel design A

Press button± (
page 194).
The indicator lamp on the button
comes on.
The cooling function and heater boost-
er system (Diesel engine) (
page 203)
are switched off.
Climate control panel design B

Press button2 (
page 195).
The indicator lamp on the button goes
out.
The cooling function (page 203) is
switched off.Activating
Moist air can fog up the windows. You can
dehumidify the air with the air condition-
ing.
Climate control panel design A

Press button± (
page 194) again.
The indicator lamp on the button goes
out.
Climate control panel design B

Press button2 (
page 195) again.
The indicator lamp on the button
comes on.
The air conditioning uses the refrigerant
R134a. This refrigerant is free of CFCs
which are harmful to the ozone layer.
iCondensation may drip out from under-
neath the vehicle. This is normal and
not an indication of a malfunction.Warning!
G
If you turn off the cooling function, the
vehicle will not be cooled when weather
conditions are warm. The windows can fog
up more quickly. Window fogging may
impair visibility and endanger you and
others.


202 Controls in detailDual-zone automatic climate control
Residual heat and ventilation* (avail-
able on climate control panel design A only)
With the engine switched off, it is possible
to continue to heat or ventilate the interior
for up to 30 minutes. This feature makes
use of the residual heat produced by the
engine.
Activating
Turn the SmartKey in the starter switch
to position0or1, or remove it from
the starter switch.

Press buttonT (
page 194).
The indicator lamp on button comes
on.Deactivating

Press buttonT (
page 194).
The indicator lamp on button goes out.
The residual heat is automatically turned
off:


when the ignition is switched on


after about 30 minutes


if the battery voltage drops
!If the air conditioning cannot be turned
on again, this indicates that the air con-
ditioning is losing refrigerant. The com-
pressor has turned itself off.
Have the air conditioning checked at
the nearest authorized Mercedes-Benz
Center.
iHow long the system will provide heat-
ing depends on the coolant tempera-
ture and the temperature set by the
operator. The blower will run at speed
setting 1 regardless of the air distribu-
tion control setting.


203 Controls in detail
Dual-zone automatic climate control
Heater booster system (Diesel engine)
Your vehicle is equipped with a heater
booster system. A PTC heating element
(page 475) ensures that the vehicle inte-
rior is warmed up as quickly as possible
when the engine has not reached its nor-
mal operating temperature yet.
The heater booster system switches on au-
tomatically if required.iIf the cooling function for the air condi-
tioning is switched off with the
±button, the heater booster sys-
tem is deactivated too (Climate control
panel design A only).

205 Controls in detail
4-zone automatic climate control*
1
Climate control panel
2
Thumbwheel for air volume control
for left center air vent
3
Left center air vent, adjustable
4
Air vent, fixed
5
Right center air vent, adjustable
6
Thumbwheel for air volume control
for right center air vent
7
Thumbwheel for air volume control
for side air vent
8
Side defroster vent, fixed
9
Side air vent, adjustable
1
Thumbwheel for air volume control
for side air vent
2
Side air vent, adjustable
1
Left rear center air vent, adjustable
2
Right rear center air vent, adjust-
able
3
Thumbwheel for air volume control
for right rear center air vent
4
Temperature rocker switch, right
5
Display
6
Temperature rocker switch, left
7
Thumbwheel for air volume control
for left rear center air vent

206 Controls in detail4-zone automatic climate control*Depending on production date, your vehi-
cle is equipped with either climate control panel design A or B.Climate control panel design A1
Air distribution, left
2
Defrosting
3
Temperature rocker switch, left
4
Display
5
Temperature rocker switch, right
6
Rear window defroster
7
Air distribution, right
8
Air distribution and air volume, right
(automatic, manual)
9
AC cooling on/off
a
Rear air-conditioning remote control
b
Increase air volume
c
Climate control on/off
d
Decrease air volume
e
Residual heat/ventilation
f
Air recirculation
g
Air distribution and air volume, left
(automatic, manual)

207 Controls in detail
4-zone automatic climate control*
Climate control panel design B1
Air distribution, left
2
Defrosting
3
Temperature rocker switch, left
4
Display
5
Temperature rocker switch, right
6
Rear window defroster
7
Air distribution, right
8
Air distribution and air volume, right
(automatic, manual)
9
AC cooling on/off
a
Rear air-conditioning remote con-
trol
b
Increase air volume
c
Climate control on/off
d
Decrease air volume
e
Air recirculation
f
Air distribution and air volume, left
(automatic, manual)

208 Controls in detail4-zone automatic climate control*
The climate control is a 4-zone intelligent
climate control system. Your vehicle interi-
or is divided into 4 zones.With the help of a sun sensor, the climate
control determines the relation of the sun
to the vehicle and automatically adjusts
the inside temperature for every individual
zone.
You can set the temperature for each of
the 4 zones separately. These settings can
be assigned to a SmartKey and stored in
memory (
page 168).
The climate control is operational whenev-
er the engine is running. It cools the vehi-
cle’s interior according to the angle and
intensity of the sun’s rays, the outside tem-
perature and the selected temperature.
You can operate the climate control sys-
tem in either the automatic or manual
mode.
Warning!
G
When operating the climate control, the air
that enters the passenger compartment
through the air vents in the footwell can be
very hot or very cold (depending on the set
temperature). This may cause burn or frost-
bite to unprotected skin in the immediate
area of the air vents. Always keep sufficient
distance between unprotected parts of the
body and the footwell air vents. If necessary
change the air flow using the air distribution
controls (
page 206) to direct the air away
from the footwell air vents.

209 Controls in detail
4-zone automatic climate control*
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 AC
OFF
mode is activated or
AC mode is deactivated (
page 206).Deactivating the 4-zone automatic cli-
mate control system
Deactivating
It is possible to deactivate the climate con-
trol system.
Press buttonM (
page 206) or
button´ (
page 207) until the dis-
play is cleared.
The climate control system is deacti-
vated.
Reactivating

Press buttonM (
page 206) or
button´ (
page 207) again.
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 pollu-
tion) may require replacement of the fil-
ter 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.
Keep the air intake grille in front of the
windshield free of snow and debris.
Do not obstruct air flow by placing ob-
jects on the air flow-through exhaust
slots below the rear window.
iWhen the air conditioning is switched
off, the outside air supply and circula-
tion are also switched off. Only choose
this setting for a short time. Otherwise
the windows could fog up.