2004 MERCEDES-BENZ C320 check engine light

31 Getting started
Unlocking
Starter switch positionsStarter switch0For removing SmartKey
The steering is locked when the
SmartKey is removed from the starter
switch. If necessary, move steering
wheel slightly to allow the locking
mechanism to engage.
1Power supply to some electrical
consumers, 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 323).


Get a jump start (
page 326).
To prevent accelerated battery
discharge and a possible dead battery,
always remove the SmartKey from the
starter switch when the engine is not in
operation.

117 Controls in detail
Control system
Menus, submenus and functions
Menu1
Menu2
Menu3
Menu4
Menu5
Menu6
Menu7
Standard display
AUDIO
NAVI*
Malfunction
memory
Settings
Trip computer
Telephone*
Commands/submenusCoolant
temperature display
Select radio station
Activate route
guidance
Call up malfunc-
tion messages
Reset to factory
settings
Fuel consumption
statistics after
start
Load phone
book
Digital speedometer
Operate CD
player*
Instrument clus-
ter submenu
Fuel consumption
statistics since
the last reset
Search for
name in
phone book
Call up FSS
Operate casette
player
Lighting
submenu
Call up range
Check engine oil
level
Vehicle
submenuConvenience
submenu

251 Operation
At the gas station
Check regularly and before a long trip
1Coolant level
For more information on coolant, see
“Coolant level” (
page 257).
2Brake fluid (fuse box cover removed)
Removing fuse box cover
(
page 333).
3Windshield washer and headlamp
cleaning system*
For more information on filling up the
washer reservoir, see “Windshield
washer system and headlamp cleaning
system*” (
page 259).Engine oil level
For more information on engine oil level,
see “Engine oil” (
page 253).
Opening hood (
page 252).
Vehicle lighting
Check function and cleanliness. For more
information on replacing light bulbs, see
“Replacing bulbs” (page 310).
Exterior lamp switch (page 102).
Tire inflation pressure
More information on tire inflation pressure
(
page 261).
!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.
Notify 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 275).

327 Practical hints
Jump starting
The battery is located in the engine
compartment on the right hand side. The
terminals for jump starting are located in
front of the battery.
Make sure the two vehicles do not
touch.

Turn off all electrical consumers.

Apply parking brake.

Shift gear selector lever to positionP
(manual transmission to Neutral).1Positive terminal of charged battery
2Positive under hood terminal in front of
discharged battery
3Negative terminal of charged battery
4Negative under hood terminal in front
of discharged battery

Connect positive terminal1 of the
charged battery with positive under
hood terminal2 in front of the
discharged battery with the jumper
cables. Clamp cable to charged
battery1 first.

Start engine of the vehicle with the
charged battery and run at idle speed.

Connect negative terminal3 of the
charged battery with negative under
hood terminal4 of the discharged
battery with the jumper cables. Clamp
cable to charged battery3 first.

Start the engine of the disabled
vehicle.
You can now again turn on the electrical
consumers. Do not turn on the lights under
any circumstances.

Remove the jumper cables first from
negative terminals3 and4 and then
from positive terminals1 and2.
You can now turn on the lights.

Have the battery checked at the near-
est authorized Mercedes-Benz Center.
Warning!
G
Keep flames or sparks away from battery.
Do not smoke.
Observe all safety instructions and precau-
tions when handling automotive batteries
(page 258).
!Vehicles with automatic transmission
and/or 4MATIC:
Do not tow-start the vehicle.

372 IndexCenter console 25
Lower part 26
PASS. AIRBAG OFF
indicator lamp 279
Upper part 25
Centigrade
Setting temperature units 127
Central locking
Automatic 90
From inside 91
Switch 91
Switching on/off
(control system) 133
Unlocking from inside 91
Central locking switch 91
Certification label 338
Changing
Batteries (SmartKey) 307
CDs 189
Key setting 133
Charcoal filter 169Charging
Vehicle battery 324
CHECK ENGINE
malfunction indicator lamp 276
Checking
Brake fluid 251
Coolant level 251, 257
Engine oil level 251, 254
Tire inflation pressure 251
Vehicle lighting 251
Child safety 63
Airbags 56
Infant and child restraint
systems 60, 63
LATCH-type child seat anchors 69
Child safety switch see
Blocking of rear door window operation
Child seat anchors
see LATCH-type child seat anchors
Cigarette lighter 221Cleaning
Cloth upholstery 272
Cup holder 271
Gear selector lever 271
Hard plastic trim items 271
Headlamps 148
Headliner and shelf below
rear window 271
Instrument cluster 270
Leather upholstery 271
Light alloy wheels 270
MB Tex upholstery 272
Plastic and rubber parts 272
Seat belts 271
Steering wheel 271
Upholstery 271
Windows 270
Windshield 48
Wiper blades 270
Wood trims 272

374 IndexCoolant 257, 356
Adding 257
Anticorrosion/antifreeze
quantity 356
Capacities 350
Checking level 257
Messages in display 287–289
Temperature 248
Temperature display 110
Coolant level
Checking 257
Cruise control 206, 362
Canceling 207
Driving downhill 207
Driving uphill 207
Fine adjustment 208
Message in display 290
Setting current speed 207
Setting speeds 208
Cruise control lever 206
Cruising range, fuel 355Cup holder
Cleaning 271
In front of seat armrest 217
In rear seat armrest 218
Customer Assistance Center see CAC
D
Daytime running lamp mode 104
Setting 129
Deactivating
Air conditioning (cooling)
Automatic climate control* 170
Climate control 160
Air recirculation mode
Automatic climate control* 168
Climate control 159
Alarm 79
Anti-theft alarm system* 79
Automatic climate control* 163
Central locking (control system) 133
Climate control 155
Climate control system 159Cruise control 207
Defrosting
Automatic climate control* 167
Climate control 158
Engine with the SmartKey 52
ESP 75
Exterior lamps 103
Exterior lamps delayed shut-off 131
Front fog lamps 131
Hazard warning flasher 106
Headlamps 51
Interior lighting delayed shut-off 132
Rapid seat heating* 98
Rear window defroster 153
Seat heating* 98
Tow-away alarm* 80
Deep water see Standing water
Defogging
Windshield
Automatic climate control* 166
Climate control 157

381 Index
K
Key dependency memory
Settings 135
Key positions in starter switch 31
Key, mechanical 305
Key, SmartKey
Battery check lamp 83
Checking the batteries 84
Factory setting 83
Global locking 83
Global unlocking 83
Loss of 85
Messages in display 293
Positions in starter switch 31
Remote control 82
Restoring to factory setting 83
Selective setting 83
Starting the engine
Automatic transmission* 44
Manual transmission 43
Turning off the engine 52Unlocking the trunk lid 84
Unlocking with 30
Kickdown 147, 363
Kilometers/miles in speedometer 128
Km/h or mph in speedometer 128
L
Labels, identification 338
Lamp bulbs, exterior 310
Lamps, exterior
Front 310
Light sensor 294
Messages in display 293–296
Rear 311
Lamps, indicator and warning
ABS 274
Battery (SmartKey) 83
Brakes 275
CHECK ENGINE 276
Engine diagnostics 276, 278
ESP 277
Fuel reserve 278Instrument cluster 274–278
PASS. AIRBAG OFF 59, 279
Seat belts 278
SRS 55, 278
Turn signals 23
Language
Multifunction display 128
Setting 128
LATCH-type child seat anchors 69
Folding back 69
Layout of poly-V-belt drive 339
Leather upholstery
Cleaning 271
License plate lamps
Messages in display 294
Replacing bulbs 311, 315
Light alloy wheels
Cleaning 270
Technical data 343
Light sensor 294
Lighter see Cigarette lighter