Compressor MERCEDES-BENZ S550 2007 W221 Owner's Manual

232 Control systemsCOMAND automatic climate control
Select climate control settings
Cen-
tral climate control menu.

Selecting “AC
OFF”: Slide qmr or
rotateymz.

Confirming selection: Press n.
A checkmark appears when the cooling
is switched off.
“AC
OFF” appears in the central menu of
the climate control settings.Selecting “Mono” mode
“Mono” is used to adjust the climate zones
for the entire vehicle at the same time.
When the “Mono” function is switched on
and you change the climate on the driver’s
side, these changes will be carried out in
the same manner for all climate zones.

Select climate control settings
Cen-
tral climate control menu.

Selecting “Mono”: Slide qmr or
rotateymz.

Confirming selection: Press n.
A checkmark appears when the func-
tion has been selected.

Exiting menu: Press back button L
in the center console (
page 80) or
slideomp.The “Mono” function is automatically
switched off when you:


change an automatic climate control
setting for the front passenger’s side
using COMAND


operate a button from the automatic
climate control for the front passen-
ger’s side


operate one of the buttons for the rear
climate control system.
Adjusting footwell temperature
The “Footwell Temperature” function is
used to adjust the temperature difference
between the footwell and the rest of the
passenger compartment.
The higher the selected value, the higher
the temperature in the footwell will be.

Select climate control settings
Cen-
tral climate control menu.
!
If the air conditioning cannot be turned on
again, this indicates that the air conditioning is
losing refrigerant. The compressor has turned it-
self off.
Have the air conditioning checked at the nearest
authorized Mercedes-Benz Center.
i
In automatic mode, this setting optimizes
the footwell temperature when outside tempera-
tures are low.

429 Controls in detail
Automatic climate control
Setting temperature
Use temperature controls %$
2anda (
page 426) in the center con-
sole or COMAND (
page 230) to sepa-
rately adjust the air temperature on each
side of the passenger compartment. You
should raise or lower the temperature set-
ting in small increments, preferably start-
ing at 72°F (22°C). The automatic climate
control will adjust to the set temperature
as fast as possible.

Press temperature control %$
2and/ora (
page 426) upward or
downward.
The climate control system will corre-
spondingly adjust the interior air tem-
perature.
Adjusting air volume
Use buttonsQ (
page 426) in the cen-
ter console or COMAND to separately ad-
just the air volume on each side of the
passenger compartment.

Press buttonQ up to increase or
down to decrease air volume.
The indicator lamps on buttonsU
(page 426) goes out.
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 button; (
page 426) up or
down.
The indicator lamp on the button
comes on.
The air conditioning switches to the follow-
ing functions automatically:


increased blowing and heating power


air flows onto the windshield and the
front side windows


the air conditioning compressor
switches on at outside temperatures
above approximately 41°F (5°C) for
dehumidifying the air


the air recirculation mode is switched
off
i
When you change the air volume, the auto-
matic function of the climate control system is
switched off.
i
Keep this setting selected only until the
windshield is clear again.

653 Technical data
Layout of poly-V-belt drive
Layout of poly-V-belt drive
S 550
1Idler pulley
2Idler pulley
3Automatic belt tensioner
4ABC* tandem pump (pump for
power-steering assistance and ABC*
chassis)
5Air conditioning compressor
6Crankshaft
7Coolant pump
8Generator (alternator)
S 600
1Automatic belt tensioner
2ABC tandem pump (pump for
power-steering assistance and ABC
chassis)
3Air conditioning compressor
4Crankshaft
5Coolant pump
6Generator (alternator)
7Idler pulley
8Idler pulley
9Idler pulley

676 Technical termsPCMCIA
(P
ersonal C
omputer M
emory C
ard
I
nternational A
ssociation)
Portable memory cards designed to be
inserted into laptop computers to en-
able additional functions.
PIN code
(P
ersonal I
dentification N
umber code)
Your PIN code prevents unauthorized
persons from using your ->GSM mobile
phone. The PIN code is a number
string, which you have to enter when
switching on the telephone.
Poly-V-belt drive
Drives engine components (alternator,
AC compressor, etc.) from the engine.Power train
Collective term designating all compo-
nents used to generate and transmit
motive power to the drive axles, includ-
ing:


Engine


Clutch/torque converter


Transmission


Transfer case


Drive shaft


Differential


Axle shafts/axles
PRE-SAFE
®
(Pre
ventive Occupant Safe
ty System)
Vehicles equipped with PRE-SAFE
®
take preventive measures when the
system senses certain driving dynam-
ics suggesting a possible accident.
Production options weight
(
page 527)Program mode selector switch
Used to switch the automatic transmis-
sion between standard operationS and
comfort operationC.
PSI
(P
ounds per s
quare i
nch)
(
page 527)
PUK
(Personal U
nblocking K
ey)
Must be entered if the wrong ->PIN was
entered three consecutive times.
Recommended tire inflation pressure
(
page 527)
REST
(Residual engine heat utilization)
Feature that uses the engine heat
stored in the coolant to heat the vehi-
cle interior for a short time after the en-
gine has been turned off.