2004 MERCEDES-BENZ C320 COUPE check engine light

Contents
Opening and closing the roller sun-
blinds for the
panorama sliding/pop-up roof ..... 189
Opening and closing the
panorama sliding/pop-up roof ..... 190
Synchronizing the
panorama sliding / pop-up roof
and the roller sunblinds ............... 193
Driving systems ................................. 194
Cruise control .............................. 194
Loading.............................................. 197
Roof rack*.................................... 197
Luggage cover.............................. 197
Split rear bench seat .................... 197
Loading instructions..................... 199
Useful features .................................. 200
Interior storage spaces ................ 200
Ashtrays ....................................... 203
Cigarette lighter ........................... 204
Telephone* .................................. 205
Tele Aid* ...................................... 206
Garage door opener ..................... 214
Operation......................................... 221
The first 1000 miles (1500km) .......... 222Driving instructions ............................ 223
Drive sensibly – save fuel.............. 223
Drinking and driving ...................... 223
Pedals ........................................... 223
Power assistance .......................... 223
Brakes........................................... 224
Driving off ..................................... 225
Parking.......................................... 225
Tires .............................................. 226
Hydroplaning................................. 227
Tire traction .................................. 227
Tire speed rating ........................... 228
Winter driving instructions ............ 228
Standing water.............................. 229
Passenger compartment ............... 230
Driving abroad .............................. 230
Control and operation of
radio transmitter ........................... 230
Catalytic converter........................ 231
Emission control ........................... 231
Coolant temperature..................... 232
At the gas station ............................... 233
Refueling....................................... 233
Check regularly and
before a long trip .......................... 234
Engine compartment .......................... 236Hood ............................................. 236
Engine oil ...................................... 237
Transmission fluid level ................ 241
Coolant level ................................. 241
Battery .......................................... 242
Windshield washer system and
headlamp cleaning system ........... 243
Tires and wheels ................................ 244
Important guidelines ..................... 244
Life of tire ..................................... 245
Direction of rotation ..................... 245
Checking tire inflation pressure .... 245
Rotating wheels ............................ 246
Winter driving ..................................... 247
Winter tires ................................... 247
Block heater (Canada only) ........... 248
Snow chains ................................. 248
Maintenance ...................................... 249
Clearing the service indicator ....... 249
Service term exceeded ................. 249
Calling up the service indicator .... 250
Resetting the service indicator ..... 250
Vehicle care ....................................... 251
Cleaning and care of the vehicle ... 251

31 Getting started
Unlocking
Starter switch positionsStarter switch0For removing SmartKey
The steering is locked when the Smart-
Key is removed from the starter switch.
If necessary, move steering wheel
slightly to allow the locking mechanism
to engage.
1Power supply to some electrical con-
sumers, such as seat adjustment
2Ignition (power supply for all electrical
consumers) and driving position
3Starting position
Warning!
G
When leaving the vehicle, always remove the
SmartKey from the starter switch and lock
the vehicle. Do not leave children unattend-
ed in the vehicle, or with access to an un-
locked vehicle. Unsupervised use of vehicle
equipment may cause an accident and/or
serious personal injury.iVehicles with automatic transmission:
The SmartKey can only be removed
from the starter switch with the gear
selector lever in positionP.
!If the SmartKey cannot be turned in the
starter switch, the battery may not be
sufficiently charged.

Check the battery and charge it if
necessary (
page 307).


Get a jump start (
page 310).
To prevent accelerated battery dis-
charge and a possible dead battery, al-
ways remove the SmartKey from the
starter switch when the engine is not in
operation.

113 Controls in detail
Control system
Menus, submenus and functions
Menu1
Menu2
Menu3
Menu4
Menu5
Menu6
Menu7
Commands/submenusStandard dis-
play
AUDIO
NAVI*
Malfunction
memory
Settings
Trip computer
Telephone
Coolant temper-
ature display
Select radio sta-
tion
Activate route
guidance
Call up malfunc-
tion messages
Reset to factory
settings
Fuel consumption
statistics after
start
Load phone
book
Digital speed-
ometer
Operate CD
player*
Instrument cluster
submenu
Fuel consumption
statistics since the
last reset
Search for name
in phone book
Call up FSS
Operate cas-
sette player
Lighting submenu
Call up range
Check engine oil
level
Vehicle submenuConvenience sub-
menu

235 Operation
At the gas station
Engine oil level
For more information on engine oil, see
“Engine oil” (
page 237).
Opening hood, see (
page 236).
Coolant
For normal replenishing, use water (pota-
ble water quality). For more information on
coolant, see “Coolant level” (
page 241)Vehicle lighting
Check function and cleanliness. For infor-
mation on replacing light bulbs, see “Re-
placing bulbs” (
page 293).
Exterior lamp switch (
page 98).
Tire inflation pressure
For information on tire inflation pressure,
see “Checking tire inflation pressure”
(
page 245).
!If you find that the brake fluid in the
brake fluid reservoir has fallen to the
minimum mark or below, have the
brake system checked for brake pad
thickness and leaks immediately. Noti-
fy an authorized Mercedes-Benz Center
immediately. Do not add brake fluid as
this will not solve the problem. For
more information, see “Practical Hints”
(page 259).

279 Practical hints
What to do if …
Display symbol
Display message
Possible cause
Possible solution
.
LIGHTS
TURN OFF LIGHTS!
This display appears if the driver’s door is
opened with the engine shut off and no
SmartKey in the starter switch.

Insert SmartKey in the starter switch.

Switch off the headlights.
LOW BEAM, L
CHECK LIGHT!
The left low beam lamp is malfunctioning.

Visit an authorized Mercedes-Benz
Center as soon as possible.
LOW BEAM, R
CHECK LIGHT!
The right low beam lamp is
malfunctioning.

Visit an authorized Mercedes-Benz
Center as soon as possible.
REVERSE LIGHT, L
CHECK LIGHT!
The left backup lamp is malfunctioning.

Replace the bulb as soon as possible.
REVERSE LIGHT, R
CHECK LIGHT!
The right backup lamp is malfunctioning.

Replace the bulb as soon as possible.
MARKER LIGHT, FL
CHECK LIGHTS!
BACK-UP LIGHT ON!
The left side marker/parking lamps are
malfunctioning. A backup bulb is being
used.

Visit an authorized Mercedes-Benz
Center as soon as possible.
MARKER LIGHT, FR
CHECK LIGHTS!
BACK-UP LIGHT ON!

The right side marker/parking lamps are
malfunctioning. A backup bulb is being
used.

Visit an authorized Mercedes-Benz
Center as soon as possible.
TAIL LIGHT, L
CHECK LIGHTS!

BACK-UP LIGHT ON!

The left tail lamp is malfunctioning.
A backup bulb is being used.

Visit an authorized Mercedes-Benz
Center as soon as possible.

350 Index
Warning lamp 259
Break-in period 222
Bulbs, replacing 293
Additional turn signals 293
Brake lamps 294
Fog lamps 293
Front lamps 293
High beam 293
High mounted brake lamp 294
License plate lamps 294, 299
Low beam 293
Parking lamps 293, 294, 296, 297
Rear fog lamp 294
Rear fog lamps 298
Side marker lamps 294, 298
Standing lamps 293, 294, 296, 297
Tail lamp assemblies 294, 298
Turn signal lamps 293, 294
Button
Audio system 162C
CAC (Customer Assistance Center) 341
Calling up
Range (distance to empty) 134
Service indicator 250
CAN system 341
Capacities
Fuels, coolants, lubricants, etc. 330
Cargo compartment
Lighting 104
Cassette operation
Playing cassettes 172
Cassette player
Operating 116
Catalytic converter 231
CD changer* 175
CD operation 175
CD player
Operating 116
Center console 25Lower part 26
PASS.AIRBAG OFF indicator
lamp 263
Upper part 25
Centigrade
Setting temperature units 123
Central locking
From inside 88
Switch 88
Switching on/off
(control system) 129
Unlocking from inside 88
Central locking switch 88
Changing
Batteries (SmartKey) 290
Key setting 129
Changing CDs 175
Charging
Vehicle battery 308
CHECK ENGINE
malfunction indicator lamp 260
Check gas cap
Message in display 277

359 Index
Starting the engine 45
Unlocking with 30
Kickdown 145, 343
Kilometers/miles in speedometer 124
Km/h or mph in speedometer 124
L
Labels, identification 322
Lamp bulbs, exterior 293
Lamps
Fog lamps 101
Lamps, exterior
Front 293
Light sensor 278
Messages in display 277, 279–??
Rear 294
Lamps, indicator and warning
ABS 258
Airbag Off 61
Battery (SmartKey) 83
Brakes 259CHECK ENGINE 260
Coolant 271
Engine diagnostics 260, 262
ESP 261
Fuel reserve 262
Instrument cluster 261–262
Seat belts 262
Service indicator 249
SRS 57
Turn signals 23
Language
Multifunction display 124
Setting 124
LATCH child seat mounts 70
Folding back 70
Layout of poly-V-belt drive 323
Leather upholstery
Cleaning 256
License plate lamps
Messages in display 278Replacing bulbs 294, 299
Light alloy wheels
Cleaning 254
Technical data 326
Light sensor 278
Lighter see Cigarette lighter 204
Lighting 98
Automatic headlamp mode 99
Combination switch 102
Daytime running lamp mode 100
Exterior lamp switch 98
Fog lamps 101
Front fog lamp 101
High beam flasher 102
High beams 102
Instrument cluster illumination 105
Interior 103
Locator lighting 100
Low beam 98
Manual headlamp mode 99

371 Index
Tire inflation pressure
Checking 235, 245
Tire speed rating 228, 345
Tire traction 227
Tires 244, 325
Collapsible 342
Consumer information 339
Direction of rotation 245
Driving instructions 226
Retreads 244
Rims and tires 325
Service life 245
Temperature 246
Temperature grades 340
Tread depth 247
Wear pattern 246
Winter 247
Tools 285
Tow-away alarm 25, 79Arming 79
Disarming 79
Disarming for transport 79
Towing eye bolt (vehicle tool kit)
Installing 316
Towing the vehicle 313
Tracking services
For stolen vehicle 214
Traction 144, 339, 345
Transmission see
Automatic transmission 241
Tread depth (tires) 247
Treadwear 339
Trim panel
Opening 318
Trip computer 132
Trip odometer
Resetting 107
Trunk
Auxiliary fuse box 318
Lighting 104Opening 85
Trunk lid
Closing 86
Emergency release 86
Message in display 283
Turn signal lamps
Replacing bulbs 293, 294
Turn signals 48
Additional in mirrors 293
Cleaning lenses 253
Front bulbs 293, 295, 297
Indicator lamps 23
Rear bulbs 294, 299
Turning off
Engine 53
U
Units
Setting speedometer units 124
Setting temperature units 123
Unlocking 30, 82