2004 MERCEDES-BENZ C320 4MATIC WAGON ECU

324 Practical hintsBattery
BatteryThe battery is located in the engine
compartment on the right hand side.
Removal of filter box:
Release the three clamps1.

Remove filter box.
Installation of filter box:

Insert filter box properly.

Secure it with the three clamps1.
Warning!
G
Failure to follow these instructions can
result in severe injury or death.
Never lean over batteries while connecting,
you might get injured.
Battery fluid contains sulfuric acid. Do not
allow this fluid to come in contact with eyes,
skin or clothing. In case it does, immediately
flush affected area with water and seek
medical help if necessary.
A battery will also produce hydrogen gas,
which is flammable and explosive. Keep
flames or sparks away from battery, avoid
improper connection of jumper cables,
smoking, etc.
!Never loosen or detach battery termi-
nal clamps while the engine is running
or the SmartKey is in the starter switch.
Otherwise the alternator and other
electronic components could be se-
verely damaged.
Have the battery checked regularly by
an authorized Mercedes-Benz Center.
Refer to Service Booklet for mainte-
nance intervals or contact your autho-
rized Mercedes-Benz Center for further
information.Warning!
G
Do not place metal objects on the battery as
this could result in a short circuit.
Use leak-proof battery only to avoid the risk
of acid burns in the event of an accident.

325 Practical hints
Battery
1Negative terminal
2Positive terminal cover
Disconnecting the battery
Turn off all electrical consumers.

Open the hood (
page 252).

Remove the filter box (
page 324).

Disconnect battery negative lead1.

Remove cover2 from positive
terminal.

Disconnect the battery positive lead.
Removing the battery
Remove the screw-nuts securing the
battery.

Remove the battery bracket.

Take out the battery.
Charging and reinstalling the battery
Charge battery in accordance with the
instructions of the battery charger
manufacturer.

Reinstall the charged battery. Follow
the previously described steps in
reverse order.
Warning!
G
With a disconnected battery

you will no longer be able to turn the
SmartKey in the starter switch


the gear selector lever will remain
locked in positionP
Warning!
G
Never charge a battery while still installed in
the vehicle. Gases may escape during charg-
ing and cause explosions that may result in
paint damage, corrosion or personal injury.

326 Practical hintsBatteryReconnecting the battery
Turn off all electrical consumers.

Connect the positive lead and fasten its
cover2.

Connect negative lead1.

Reinstall the filter box (
page 324).Batteries contain materials that can harm
the environment if disposed of improperly.
Large 12 volt storage batteries contain
lead. Recycling of batteries is the preferred
method of disposal. Many states require
sellers of batteries to accept old batteries
for recycling.
!NEVER invert the terminal connections.!The battery, its filler caps and the vent
tube must always be securely installed
when the vehicle is in operation.
iThe following procedures must be
carried out following any interruption of
battery power (e.g. due to reconnec-
tion):

Set the clock (
page 124).
Vehicles with COMAND*:
See COMAND operator’s manual.


Resynchronize the ESP
(page 282).


Resynchronize side windows
(page 198).


Resynchronize sliding/pop-up
roof* (
page 201).

334 Practical hintsFuses
Install cover2 in reverse order.
Opening fuse box
4Fuse box cover
5Clamps

Release clamps5.

Remove cover4.
Closing fuse box

Ensure that the sealing rubber is
properly positioned.

Press cover4 down and secure with
clamps5.Auxiliary fuse box in cargo compart-
ment
The auxiliary fuse box is located in the car-
go compartment behind the left hand trim
panel.
1Button for unlocking trim panel
2Trim panel
Opening trim panel
Press button1.

Fold down trim panel2.3Spare fuses
4Auxiliary fuse box
5Fuse extractor
Spare fuses
Spare fuses are found in the vehicle tool kit
in the cargo compartment.
Fuse extractor
The fuse extractor is found in the vehicle
tool kit in the cargo compartment.


376 IndexL
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
Airbag Off 61
Battery (SmartKey) 85
Brakes 275
CHECK ENGINE 276
Coolant 287
Engine diagnostics 276, 278
ESP 277
Fuel reserve 278
Instrument cluster 274–278
Seat belts 278
Service indicator 265
SRS 57
Turn signals 23Language
Multifunction display 126
Setting 126
LATCH-type child seat anchors 71
Folding back 71
Layout of poly-V-belt drive 339
Leather upholstery
Cleaning 271
License plate lamps
Messages in display 294
Replacing bulbs 311, 316
Light alloy wheels
Cleaning 270
Technical data 342
Light sensor 294
Lighter see Cigarette lighter
Lighting 100
Automatic headlamp mode 101
Cargo compartment 106
Combination switch 104
Daytime running lamp mode 102
Door entry lamps 106
Exterior lamp switch 100Front fog lamps 102
High beam flasher 104
High beams 104
Instrument cluster illumination 107
Interior 105
Locator lighting 102
Low beam 100
Manual headlamp mode 101
Night security illumination 102
Parking lamps 100
Rear fog lamp 103
Settings (control system) 127
Limiting the gear range 141
Limp Home Mode 144
Loading 205
Cargo tie-down rings 214
Instructions 213
Roof rack 205
Ski sack* 205
Split rear bench seat 211
Locator lighting 102
Setting 128

379 Index
N
Navigation system
Operating 119
See separate COMAND*
operating instructions
Night security illumination 102
Setting 129
O
Occupant safety 56
Airbags 57
Children and airbags 58
Children in the vehicle 65
Fastening the seat belt 40
Infant and child restraint systems 65
LATCH-type child seat anchors 71
Seat belts 40, 60
Odometer, main 23
Oil
Adding 256
Consumption 254
Filler neck 256Oil level
Checking 251
One-touch gearshifting 140
Canceling gear range limit 140
Downshifting 140
Upshifting 140
Opening
Ashtray 219
Doors from the inside 87
Fuel filler flap 250
Fuel filler flap manually 308
Glove box 215
Hood 252
Side windows 197
Sliding/pop-up roof 199, 309
Sliding/pop-up roof in an
emergency 309
Sliding/pop-up roof with
SmartKey 200
Tailgate 87
Windows 196
Windows with SmartKey 198Operating
Audio system 169
Cassette player 119
CD player 118
COMAND* see separate
operating instructions
Navigation system 119
Radio 117
Radio transmitter 246
Telephone* 136, 169, 189
Vehicle outside
the USA and Canada 13
Operating safety
Audio system 169
Operator’s Manual 10
Ornamental moldings 269
Outer seats
Rear seat head restraints 94
Outside temperature indicator 109
Overdue service 265
Overhead control panel 27

383 Index
S
Safety
Occupant 56
Safety belts see Seat belts
Safety defects
Reporting 18
Safety systems
Driving 74
Saving current speed 203
Searching
Radio station 117
Seat belt force limiter 65
Seat belt height adjustment 42
Front seats 42
Rear outer seats 42
Seat belts 62
Cleaning 271
Fastening 40
Height adjustment 42Proper use of 42, 64
Safety guidelines 60
Warning lamp 278
Seat cushion depth
Adjusting 95
Seat heater*
Switching off 96
Switching on 96
Seats 90
Adjusting 32, 33
Easy entry/exit feature* 90
Heater* 95
Manual seat 33
Multicontour seat* 95
Power seat* 35
Split rear bench seat 211
Securing cargo
Cargo tie-down rings 214
Selecting
Display 127Self-test
BabySmart
TM airbag
deactivation system 68
Tele Aid* 223
Service
Calling up the service indicator 266
Major service (Service B) 265
Minor service (Service A) 265
Overdue 265
Spare parts 336
Types 265
When due 265
Service and Warranty Booklet
Loss of 337
Service and warranty information 10
Service indicator 265
Calling up 266
Clearing 265, 266
Service life (tires) 261
Service see Maintenance
Service System see FSS

384 IndexSetting
Convenience functions 123, 132
Cruise control 203
Daytime running
lamp mode 127, 128
Exterior rear view mirror parking
position 99
Higher speed in cruise control 204
Hours (clock) 124
Individual vehicle settings 121
Interior lighting delayed shut-off 130
Key dependent memory 133
Lamps and lighting (control
system) 127
Language, multifunction display 126
Locator lighting 128
Lower speed in cruise control 204
Miles/kilometers in
speedometer 126
Minutes (clock) 124
Night security illumination 129Parking position for exterior rear view
mirrors 134
Slower speed in cruise control 204
Speed in cruise control 204
Speedometer display mode 126
Station selection mode 131
Temperature (Interior) 161
Temperature (interior) 152
Temperature indicator 125
Time display mode (Clock) 125
Units
Speedometer 126
Temperature 125
Settings
Convenience functions 132
Factory, SmartKey 85
Individual (SmartKey) 133
Lighting (control system) 127
Menus and submenus 113
Resetting all (control system) 121
Resetting in the submenu 122
Selective 85Settings menu
Functions in 121
Individual vehicle settings 121
Submenus 122
Shift lock (Automatic transmission) 360
Shifting
Gear selector lever positions 142
Into optimal gear range
(automatic transmission) 140
Shutting off
Delayed (exterior lamps) 129
Side impact airbags 62
Side marker lamps
Replacing bulbs 310, 311, 315
Side markers
Cleaning 269
Side windows
Automatic closing 197
Automatic opening 197
Cleaning 270
Closing 196, 197, 198
Closing fully 197