Page 216 of 491

215 Controls in detail
4-zone automatic climate control*
Adjusting manually
Turn air distribution controls on each
side of the passenger compartment to
the desired symbol.
The indicator lamp in theU button
goes out.
Adjusting automatically
Press left or rightU button
(page 210) or (
page 211).
The indicator lamp in theU button
illuminates. The air distribution is ad-
justed automatically.
Windshield fogged on the outside
Switch the windshield wipers on.
Press the left or rightU button
(page 210) or (
page 211).
Adjusting air volume
Use buttonU for automatic mode or air
volume controls orQ
(page 210) to adjust air volume
manually.
Adjusting manually
Nine blower speeds are available.
Press to decrease orQ
(page 210) or (
page 211) to in-
crease air volume to the desired level.
The
AUTO
display disappears and the
automatic mode is switched off. The
selected blower speed is shown in the
display.
Adjusting automatically
Press left or right U button
(page 210) or (
page 211).
The
AUTO
display appears and the air
volume is adjusted automatically.
Defrosting
Activating
Press buttonP (
page 210)
or0 (
page 211).
The indicator lamp on the button
comes on.
The air conditioning switches
automatically to the following functions:
maximum blowing and heating
power
air flows onto the windshield and
the front side windows
the air recirculation mode is
switched off
iThese settings should only be selected
for a short time.
Page 217 of 491

216 Controls in detail4-zone automatic climate control*Deactivating
Press buttonP (
page 210)
or0 (
page 211).
The indicator lamp on the button goes
out. Defrosting is turned off.
Maximum cooling MAX COOL
If the left and right air distribution controls
as well as the airflow volume control are
set toU and there is a high need for
cooling, the display “MAX COOL” appears
in the front and rear display.
This provides the fastest possible cooling
of the vehicle interior (when windows and
tilt/sliding sunroof* are closed).
Air recirculation mode
Switch to air recirculation mode to prevent
unpleasant odors from entering the vehicle
from the outside. This setting cuts off the
intake of outside air and recirculates the
air in the passenger compartment.Activating
Press buttonO (
page 210) or
(
page 211).
The indicator lamp on the button
comes on.
Warning!
G
When the outside temperature is below
41°F (5°C), only switch to air recirculation
mode for short periods to prevent window
fogging.
Window fogging may impair visibility and
endanger you and others.
iIf you keep buttonO pressed, the
side windows and the tilt / sliding sun-
roof* will close.
Page 219 of 491

218 Controls in detail4-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 210).
The indicator lamp on the button
comes on.
AC
OFF
in the display comes on.
The cooling function is switched off.
Climate control panel design B
Press buttonœ (
page 211).
The indicator lamp on the button goes
out.
The cooling function 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 210) again.
The indicator lamp on the button goes
out.
AC
OFF
in the display goes out.
Climate control panel design B
Press buttonœ (
page 211) 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.
Page 220 of 491

219 Controls in detail
4-zone automatic climate control*
Residual heat and ventilation (available
on 4-zone automatic 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 position0 or1, or remove it from
the starter switch.
Press buttonT(
page 210).
REST in the display comes on.
Deactivating
Press buttonT(
page 210).
REST in the display goes out.
The residual heat is automatically turned
off
when the ignition is switched on
after about 30 minutes
if the battery voltage drops
Rear air conditioning
1Left rear center air vent, adjustable
2Right rear center air vent, adjustable
3Thumbwheel for air volume control for
right rear center air vent
4Temperature rocker switch, right
5Display
6Temperature rocker switch, left
7Thumbwheel for air volume control for
left rear center air vent
!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.
Page 221 of 491
220 Controls in detail4-zone automatic climate control*Display1Temperature, left
2Temperature, right
Basic settings
We recommend setting the temperature
on both the left- and right-hand sides to
72°F (22°C). This ensures a pleasant tem-
perature in the rear of the vehicle.
The temperatures for the left- and
right-hand sides can be set using tempera-
ture rocker switches4 and6.Adjusting the rear settings with the
front control panel
Display
Press the™ button (
page 210)
or5 (
page 211).
The display switches over.
The temperature for the rear left- and
right-hand sides of the vehicle can be set
with temperature rocker switches4
and6.
The temperature display disappears ap-
proximately five seconds after the last
SmartKey confirmation and switches back
to the normal display.
iThe normal display will appear when
the™ button or the button5 is
pressed again.
Page 230 of 491

229 Controls in detail
Driving systems
1Set current or higher speed
2Set current or lower speed
3Cancel cruise control
4Resume at previously set speedSetting current speed
Accelerate or decelerate to the desired
speed.
Briefly lift1 or depress2 the cruise
control lever.
The current speed is set.
Remove your foot from the accelerator
pedal.
Cruise control is activated.
The selected speed appears in the multi-
function display for approximately five sec-
onds, and the corresponding speedometer
segments from the selected speed to the
vehicle maximum speed are illuminated.
iOn uphill or downhill grades, cruise
control may not be able to maintain the
set speed. Once the grade eases, the
set speed will be resumed.
E 320, E 500:
On downhill grades, the cruise control
will hold the set speed with active brak-
ing action.
In addition, on longer downhill grades
the automatic transmission will auto-
matically downshift.
E 320 4MATIC, E 500 4MATIC:
If the engine’s braking power does not
brake the vehicle sufficiently on down-
hill grades, the automatic transmission
will automatically downshift.
Page 231 of 491

230 Controls in detailDriving systemsCanceling cruise control
There are several ways to cancel cruise
control:
Step on the brake pedal.
Cruise control will be canceled. The
last speed set will be stored for later
use.
or
Briefly push the cruise control lever to
position3.
Cruise control will be canceled. The
last speed set will be stored for later
use.iThe last stored speed is canceled when
you turn off the engine.
iCruise control automatically switched
off, if
E 320, E 500:
you step on the brake pedal.
you depress the parking brake ped-
al.
In this case the segments in the
multifunction display go out and no
warning sounds.
the vehicle speed is under 25 mph
(40 km/h).
ESP is in operation or switched off
with the ESP switch (
page 92).
you move the gear selector lever in
position N while driving.
The segments in the multifunction dis-
play go out, and an acoustic warning
sounds.
E 320 4MATIC, E 500 4MATIC:
you step on the brake pedal.
you move the gear selector lever to
position N while driving.
the vehicle speed is below 20 mph
(30 km/h).
ESP is in operation.
The segments in the multifunction dis-
play are flashing.
!Moving gear selector lever to
positionN while driving also cancels
cruise control. However, the gear se-
lector lever should not be moved to
positionN while driving except to coast
when the vehicle is in danger of skid-
ding (e.g. on icy roads).
Page 232 of 491

231 Controls in detail
Driving systems
Setting a higher speed
Lift cruise control lever to position1
and hold it up until the desired speed is
reached.
Release cruise control lever.
The new speed is set.
Setting a lower speed
Depress cruise control lever to
position2 and hold it down until the
desired speed is reached.
Release cruise control lever.
The new speed is set.Fine adjustment in 1 mph
(Canada: 1 km / h) increments
Faster
Briefly tip cruise control lever in the di-
rection of arrow1.
Slower
Briefly tip cruise control lever in the di-
rection of arrow2.Setting to last stored speed
(“Resume” function)
Briefly push cruise control lever to
position4.
The cruise control resume the last set
speed.
Remove your foot from the accelerator
pedal.
The selected speed appears in the multi-
function display for approximately five sec-
onds, and the corresponding speedometer
segments from the selected speed to the
vehicle maximum speed are illuminated.
iDepressing the accelerator pedal does
not deactivate cruise control. After
brief acceleration (e.g. for passing),
cruise control will resume the last
speed set.
iE 320, E 500:
When you use the cruise control lever
to decelerate, the brake system will au-
tomatically brake the vehicle if the en-
gine’s braking power does not brake
the vehicle sufficiently.
E 320 4MATIC, E 500 4MATIC:
When you use the cruise control lever
to decelerate, the transmission will au-
tomatically downshift if the engine’s
braking power does not brake the vehi-
cle sufficiently.
Warning!
G
The speed stored in memory should only be
set again if prevailing road conditions per-
mit. Possible acceleration or deceleration
differences arising from returning to preset
speed could cause an accident and/or seri-
ous injury to you and others.