air conditioning MERCEDES-BENZ C320 COUPE 2004 CL203 Owner's Manual

Contents
Automatic central locking .............. 87
Locking and unlocking
from the inside ............................... 88
Seats.................................................... 89
Easy-entry/exit feature* ................ 89
Removing and installing
front seat head restraints ............... 90
Rear seat head restraints ............... 91
Heated seats* ................................ 93
Memory function*................................ 95
Storing positions into memory ....... 96
Recalling positions from memory ... 96
Storing exterior rear view mirror
parking position ............................. 97
Lighting ................................................ 98
Exterior lamp switch ....................... 98
Combination switch...................... 102
Hazard warning flasher................. 102
Interior lighting ............................. 103
Instrument cluster ............................. 105
Instrument cluster illumination..... 105
Coolant temperature display ........ 106
Trip odometer............................... 107
Tachometer .................................. 107
Outside temperature indicator ..... 107
Control system .................................. 109Multifunction display .................... 109
Multifunction steering wheel ........ 110
Menus .......................................... 112
Standard display menu ................ 114
AUDIO menu ................................ 114
NAVI* menu ................................. 117
Malfunction memory menu .......... 117
Settings menu .............................. 118
Trip computer menu ..................... 132
TEL menu* ................................... 134
Manual transmission ......................... 137
Shifting into reverse ..................... 138
Automatic transmission* ................... 139
One-touch gearshifting................. 140
Gear ranges.................................. 141
Gear selector lever position ......... 142
Program mode selector switch..... 144
Accelerator position ..................... 145
Emergency operation
(Limp Home Mode) ...................... 145
Good visibility .................................... 146
Rear view mirrors ......................... 146
Headlamp cleaning system* ........ 148
Sun visors .................................... 148
Rear window defroster ................. 149
Climate control .................................. 150Setting the temperature............... 153
Adjusting
air distribution and volume .......... 153
Defrosting .................................... 154
Air recirculation mode.................. 154
Deactivating the
climate control system................. 155
Air conditioning............................ 156
Ventilated storage compartment . 157
Rear passenger compartment
adjustable air vents...................... 158
Audio system ..................................... 159
Audio and telephone, operation ... 159
Operating safety .......................... 159
Operating and display elements... 160
Button and soft key operation...... 162
Operation ..................................... 162
Radio operation ........................... 165
Satellite radio (SAT)* (USA only) .. 168
Cassette operation ...................... 172
CD changer* operation ................ 175
Telephone* operation .................. 179
Power windows ................................. 186
Opening and closing the windows 186
Synchronizing power windows ..... 188
Panorama sliding/pop-up roof* ........ 189

ContentsPractical hints.................................. 257
What to do if … .................................. 258
Lamps in instrument cluster ......... 258
Lamp in center console ................ 263
Messages in the display ............... 264
Where will I find ...?............................ 284
First aid kit ................................... 284
Spare wheel ................................. 285
Vehicle tool kit ............................. 285
Unlocking/locking in an emergency .. 288
Unlocking the vehicle ................... 288
Locking the vehicle ...................... 289
Changing batteries in
the SmartKey ............................... 290
Fuel filler flap ............................... 291
Manually unlocking the
gear selector lever........................ 291
Opening/closing in an emergency ..... 292
Panorama sliding/pop-up roof ..... 292
Replacing bulbs ................................. 293
Bulbs ............................................ 293
Replacing bulbs for front lamps.... 295
Side marker lamp bulb ................. 298
Replacing bulbs for rear lamps ..... 298
Replacing wiper blades ...................... 300Removing ..................................... 300
Installing ...................................... 300
Flat tire .............................................. 301
Preparing the vehicle ................... 301
Mounting the spare wheel ............ 301
Battery ............................................... 307
Disconnecting the battery ............ 308
Removing the batteries ................ 308
Charging and reinstalling
batteries....................................... 308
Reconnecting the batteries .......... 308
Jump starting ..................................... 310
Towing the vehicle ............................. 313
Installing towing eye bolt ............. 316
Fuses ................................................. 317
Fuse box in
passenger compartment .............. 317
Fuse box in engine compartment . 317
Auxiliary fuse box in trunk ............ 318
Technical data................................. 319
Spare parts service ............................ 320
Warranty coverage............................. 321
Loss of Service and Warranty
Information Booklet ..................... 321Identification labels ........................... 322
Layout of poly-V-belt drive ................. 323
C 230 Kompressor ....................... 323
C 320 ........................................... 323
Engine ............................................... 324
Rims and Tires ................................... 325
Same size tires............................. 326
Spare wheel ................................. 326
Electrical system ............................... 327
Main Dimensions ............................... 328
Weights ............................................. 329
Fuels, coolants, lubricants, etc. ......... 330
Capacities .................................... 330
Engine oils ................................... 332
Engine oil additives ...................... 332
Air conditioning refrigerant .......... 332
Brake fluid.................................... 332
Premium unleaded gasoline ......... 333
Fuel requirements ........................ 333
Gasoline additives ........................ 334
Flexible Fuel Vehicles................... 334
Coolants ...................................... 336
Windshield washer system and
headlamp cleaning system........... 338
Consumer information ....................... 339
Uniform tire quality grading ......... 339

152 Controls in detailClimate controlThe climate control is operational whenev-
er the engine is running. You can operate
the climate control system in either the au-
tomatic or manual mode. The system cools
or heats the interior depending on the se-
lected interior temperature and the cur-
rent 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 AC
OFF
mode is selected
(
page 156).
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 case burns or frost-
bite on 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 to direct the air away from the foot-
well air vents (
page 153).
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.

155 Controls in detail
Climate control
Deactivating
Press buttonO (
page 151).
The indicator lamp on the button goes
out.
The air recirculation mode is deactivated
automatically:


after five minutes if the outside temper-
ature is below approximately 41°F
(5 °C)


after five minutes if the air conditioning
is turned off


after 30 minutes if the outside temper-
ature is above approximately 41°F
(5 °C)At outside temperatures above 79°F
(26 °C) the system will not automatically
switch back to outside air. A quantity of
outside air is added after approximately
30 minutes.
Deactivating the climate control sys-
tem
Deactivating
Set the air volume control1
(page 151) to position0.
The indicator lamp on the button
comes on.
Reactivating

Set the air volume control1
(page 151) to any speed.
Vehicles without panorama sliding /pop-up
roof:
In the event that the procedure causes po-
tential danger, the opening and closing of
the side windows can be immediately halted
by pressing or pulling the respective window
switch.
Vehicles with panorama sliding /pop-up
roof:
In the event that the procedure causes po-
tential danger, the opening and closing of
the side windows can be immediately halted
by releasing the O button or by pressing
or pulling the respective window switch. The
opening and closing of the panorama sliding
/pop-up roof* can be immediately halted by
releasing the O button or by moving the
panorama sliding /pop-up roof switch in the
overhead control panel in any direction.
iIf you keep buttonO pressed the
side windows and panorama slid-
ing/pop-up roof* will return to their
previous position.

156 Controls in detailClimate controlAir conditioning
The air conditioning is operational while
the engine is running and cools the interior
air to the temperature set by the operator.Activating
Moist air can fog up the windows. You can
dehumidify the air with the air condition-
ing.

Press± again (
page 151).
The indicator lamp on the button±
goes out.
The air conditioning system uses the refrig-
erant R134a. This refrigerant is free of
CFCs which are harmful to the ozone layer.
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.

Press button± (
page 151).
The indicator lamp on the button±
comes on.
iCondensation may drip out from under-
neath the vehicle. This is normal and
not an indication of a malfunction.
!If the air conditioning cannot be turned
on again, this indicates that the air con-
ditioning system is losing refrigerant.
The compressor has turned itself off.
Have the air conditioning system
checked at the nearest authorized
Mercedes-Benz Center.

323 Technical data
Layout of poly-V-belt drive
Layout of poly-V-belt drive
C230Kompressor
1Power steering pump
2Idler pulley
3Supercharger
4Automatic belt tensioner
5Air conditioning compressor
6Crankshaft
7Coolant pump
8Generator (alternator)
C320
1Automatic belt tensioner
2Power steering pump
3Air conditioning compressor
4Crankshaft
5Coolant pump
6Generator (alternator)
7Idler pulley

331 Technical data
Fuels, coolants, lubricants, etc.
Model
Capacity
Fuels, coolants, lubricants, etc.
Fuel tank
including a reserve of
16.4 US gal (62.0 l)
2.1 US gal (8.0 l)
Premium unleaded gasoline:
Posted Octane 91 (Avg. of 96 RON / 86 MON)
Flexible Fuel Vehicles (identified by a label reading Premium
gasoline or E85 only! on fuel filler flap):
Alternative fuel: Ethanol fuel (E85)
Air conditioning system
R-134a refrigerant and special PAG lubricant oil (never R-12)
Windshield washer and
headlamp cleaning sys-
tem:
Without headlamp clean-
ing system
With headlamp cleaning
system
3.2 US qt (3 l)
6.4 US qt (6 l)
MB Windshield Washer Concentrate
1
1Use MB Windshield Washer Concentrate “S” and water for temperatures above freezing point or MB Windshield Washer Concentrate “S” and commercially available
premixed windshield washer solvent/antifreeze for temperatures below freezing point. Follow suggested mixing ratios (page 338).

332 Technical dataFuels, coolants, lubricants, etc.Engine oils
Engine oils are specifically tested for their
suitability in our engines. Therefore, use
only engine oils approved by
Mercedes-Benz. Information on approved
products is available in the Factory Ap-
proved Service Products pamphlet, or at
your authorized Mercedes-Benz Center.Please follow FSS recommendations for
scheduled oil changes. Failure to do so
could result in engine damage not covered
by the Mercedes-Benz Limited Warranty.
Engine oil additives
Do not blend oil additives with engine oil.
They may damage the engine.
Damage or malfunctions resulting from
blending oil additives are not covered by
the Mercedes-Benz Limited Warranty.Air conditioning refrigerant
R-134a (HFC) refrigerant and special PAG
lubricating oil is used in the air condition-
ing system.Never use R-12 (CFC) or mineral-based lu-
bricating oil. Otherwise damage to the
system will occur.
Brake fluid
During vehicle operation, the boiling point
of the brake fluid is continuously reduced
through the absorption of moisture from
the atmosphere. Under extremely strenu-
ous operating conditions, this moisture
content can lead to the formation of bub-
bles in the system, thus reducing the sys-
tem’s efficiency.
Therefore, the brake fluid must be re-
placed every two years, preferably in the
spring.
Only brake fluid approved by
Mercedes-Benz is recommended. Your au-
thorized Mercedes-Benz Center will pro-
vide you with additional information.
!Always check the oil filler cap
(page 240) for important informa-
tion pertaining to the engine oil need-
ing to meet a specific Mercedes-Benz
specification (e.g. MB 229.5). If such
information is printed on the oil filler
cap, only use an engine oil from the list
of approved engine oils in the Factory
Approved Service Products pamphlet
that meets the specification indicated
on the oil filler cap.
!Using engine oils of other specification
may cause the FSS to incorrectly deter-
mine the next service interval and will
result in engine damage not covered by
the Mercedes-Benz Limited Warranty.

347 Index
A
ABS 23, 73, 341
Malfunction indicator lamp 258
Messages in display 268
Warning lamp 258
Accelerator position, automatic
transmission 145
Accident
In case of 51
Activating
Air conditioning (cooling) 156
Air recirculation mode 154
Anti-theft alarm system 78
Central locking (control system) 129
Climate control 151
Defrost 154
Easy-entry/exit feature 130
ESP 77
Exterior headlamps 48
Exterior lamps 99
Hazard warning flasher 102Headlamps 48
High beams 102
Ignition 31
Immobilizer 78
Rear fog lamp 100
Rear window defroster 149
Seat heater* 94
Tow-away alarm 79
Windshield wipers 49
Adding
Coolant 241
Engine oil 239
Additional turn signals 293
Adjustable air outlets
Rear passenger compartment 158
Adjusting 32
Air distribution 153
Air volume 153
Backrest tilt 33, 35
Exterior rear view mirror 40Head restraint height 34, 36, 91
Head restraint tilt 34, 36
Head restraints 92
Instrument cluster illumination 105
Interior rear view mirror 39
Manual seat 33
Mirrors 39
Rear seat head restraints 91
Seat cushion tilt 33, 35
Seat fore and aft adjustment 33, 35
Seat height 33, 35
Seats 32
Steering column height 38
Steering column length 38
Steering wheel 37
Air conditioner (cooling)
Turning off 156
Turning on 156
Air conditioner refrigerant 332

352 Index
AUDIO menu 114
Convenience submenu 129
Display digital speedometer 114
Functions 110, 113
Instrument cluster submenu 122
Lighting submenu 125
Malfunction memory menu 117
Menus 112, 113, 343
Multifunction display 109
Multifunction steering wheel 110
NAV menu 117
Selecting radio system 115
Settings menu 118
Standard display menu 114
Submenus 111, 113
TEL* menu 134
Trip computer menu 132
Vehicle submenu 128
Convenience submenu 129
Activating easy-entry/exit
feature 130Setting key dependency 131
Setting parking position for
exterior rear view mirror 132
Coolant 241, 336
Adding 241
Anticorrosion/antifreeze
quantity 336
Capacities 330
Checking level 241
Messages in display 271, 272
Temperature 232
Temperature indicator 106
Warning lamp 272
Coolant level
Checking 235, 241
Cruise control 194, 342
Canceling 195
Driving downhill 195
Driving uphill 195
Fine adjustment 196
Message in display 274
Saving current speed 195Setting speeds 196
Cruise control lever 194
Cruising range, fuel 335
Cup holder
Cleaning 255
In front seat armrest 201
Customer Assistance Center (CAC) 341
D
Daytime running lamp mode 100
Setting 125, 126
Deactivating
Air conditioning (cooling) 156
Air recirculation mode 155
Alarm 79
Anti-theft alarm system 79
Central locking (control system) 129
Climate control 151
Cruise control 195
Defrost 154
ESP 76