2005 MERCEDES-BENZ C320 check engine light

33 Getting started
Unlocking
Starter switch positions SmartKey
Starter 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 adjustment2Ignition (power supply for all electrical
consumers) and driving position.
All lamps in the instrument cluster
come on. If a lamp in the instrument
cluster fails to come on when the
ignition is switched on, have it checked
and replaced if necessary. If a lamp in
the instrument cluster remains on after
starting the engine or comes on while
driving, refer to “Lamps in instrument
cluster” (
page 302).
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.

125 Controls in detail
Control system
Menus, submenus and functions
Menu1
Menu2
Menu3
Menu4
Menu5
Menu6
Menu7
Standard display
AUDIO
NAV*
Vehicle status
message memory
Settings
Trip computer
Telephone*
(page 126)
(page 127)
(page 130)
(page 130)
(page 132)
(page 148)
(page 150)
Commands/submenusDigital speedometer
or outside tempera-
ture
Select radio
station
Activate route
guidance
Call up vehicle mal-
function, warning
and system status
messages stored in
memory
Reset to factory
settings
Fuel consumption
statistics after
start
Load phone
book
Call up maintenance
service display
Select satellite
radio station*
(USA only)
Instrument clus-
ter submenu
Fuel consumption
statistics since
the last reset
Search for
name in
phone book
Check engine oil
level
Operate the
CD player*
Time/Date
submenu
Call up range
Lighting
submenuVehicle
submenuConvenience
submenu

277 Operation
At the gas station
Check regularly and before a long trip
1Coolant
2Brake fluid (fuse box cover removed)
3Windshield washer and headlamp
cleaning system*Coolant
For normal replenishing, use water (pota-
ble water quality). For more information,
see “Coolant level” (
page 283) and see
“Fuels, coolants, lubricants, etc.”
(
page 387).
Brake fluid
Removing fuse box cover (
page 370).Windshield washer and headlamp
cleaning system*
For more information on filling up the
washer reservoir, see “Windshield washer
system and headlamp cleaning system*”
(
page 285).
Engine oil level
For more information on engine oil level,
see “Engine oil” (
page 279).
Vehicle lighting
Check function and cleanliness. For more
information on replacing light bulbs, see
“Replacing bulbs” (page 344).
Exterior lamp switch (page 109).
Tire inflation pressure
More information on tire inflation pressure
(
page 287).
iOpening the hood, see (
page 278).
!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 303).

364 Practical hintsJump startingThe 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 under hood terminal in front
of discharged battery
4Negative terminal of charged 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 terminal4 of the
charged battery with negative under
hood terminal3 in front of the
discharged battery with the jumper
cables. Clamp cable to charged
battery4 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 terminals4 and3 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 284).
!Vehicles with automatic transmission
and/or 4MATIC:
Do not tow-start the vehicle.

410 IndexCharging
Vehicle battery 361
Checking
Brake fluid 277
Coolant level 277, 283
Engine oil level 277, 280
Tire inflation pressure 277
Vehicle lighting 277
Washer reservoir level 277
Child safety 67
Air bags 60
Infant and child restraint
systems 64, 67
LATCH-type child seat anchors 73
Child safety switch see
Blocking of rear door window operation
Child seat anchors see
LATCH-type child seat anchors
Cigarette lighter 246
Cleaning
Cloth upholstery 300
Cup holders 299
Gear selector lever 299Hard plastic trim items 299
Headlamps 168
Headliner and shelf below
rear window 299
Instrument cluster 298
Leather upholstery 299
Light alloy wheels 298
MB Tex upholstery 300
Plastic and rubber parts 300
Seat belts 299
Steering wheel 299
Upholstery 299
Windows 298
Windshield 52
Wiper blades 298
Wood trims 300
Climate control 174
Clock 25, 121, 137, 138
Closing
Cup holder, in rear seat armrest 245
Glove box 241
Hood 279Tilt/sliding sunroof* 227
Tilt/sliding sunroof*
in an emergency 341
Tilt/sliding sunroof*
with SmartKey 229
Trunk lid 94
Windows 223, 224
Windows with SmartKey 225
Cloth upholstery
Cleaning 300
Cockpit 22, 399
Cockpit Management and
Data System see COMAND*
Collapsible tire 383
Collapsible tire (C 55 AMG only) 334
Collapsible wheel chock 332
COMAND* 400
COMAND* see separate
operating instructions
Combination switch 113
High beam flasher 50
Turn signals 50
Windshield wipers 51

419 Index
Key, SmartKey
Battery check lamp 89
Checking the batteries 91
Factory setting 89
Global locking 89
Global unlocking 89
Loss of 91
Messages in display 322
Positions in starter switch 33
Remote control 88
Restoring to factory setting 90
Selective setting 89
Starting the engine,
automatic transmission* 47
Starting the engine,
manual transmission 46
Turning off the engine 56
Unlocking the trunk lid 91
Unlocking with 32
Kickdown 163, 401
Kilometers/miles in speedometer 135
Km/h or mph in speedometer 135L
Labels, identification 376
Lamp bulbs, exterior 344
Lamp sensor
Message in display 324
Lamps, exterior
Front 345
Light sensor 324
Messages in display 323–326
Rear 345
Lamps, indicator and warning
ABS 25, 302
Battery (SmartKey) 89
Brakes 25, 303
Engine diagnostics 304, 307
Engine malfunction 25, 304–305
ESP 25, 306
Front fog lamps 109
Front passenger
front air bag off 27, 63, 70, 308
Fuel reserve 25, 307
High beam headlamps 25Instrument cluster 302–307
Low beam headlamps 25
Maintenance service indicator 292
Rear fog lamp 109
Seat belt telltale 25, 307
SRS 25, 59, 307
Turn signals 25
Language
Multifunction display 136
Setting 136
LATCH-type child seat anchors 73
Folding back 74
Layout of poly-V-belt drive 377
Leather upholstery
Cleaning 299
Lever for voice control system* 23
License plate lamps
Messages in display 324
Replacing bulbs 345
Light alloy wheels
Cleaning 298
Technical data 381, 382

434 IndexVehicle battery 360
Vehicle care 295
Cloth upholstery 300
Cup holders 299
Engine cleaning 297
Gear selector lever 299
Hard plastic trim items 299
Headlamps 297
Instrument cluster 298
Leather upholstery 299
Light alloy wheels 298
MB Tex upholstery 300
Ornamental moldings 297
Paintwork 296
Plastic and rubber parts 300
Power washer 296
Seat belts 299
Side markers 297
Steering wheel 299Tail lamps 297
Tar stains 296
Turn signals 297
Upholstery 299
Vehicle washing 297
Window cleaning 298
Wiper blades 298
Wood trims 300
Vehicle Identification Number see VIN
Vehicle jack 331
Vehicle lighting
Checking 277
Vehicle status message memory 130
Calling up 130
Clearing 131
Vehicle status messages
Displaying 131Vehicle tool kit 329
Alignment bolt 329
Collapsible wheel chock 329
Gloves 329
Jack 329
Protective wrap (C 55 AMG only) 329
Removing (C 55 AMG only) 330
Removing (except C 55 AMG) 329
Spare fuses 329
Spare wheel bolts 329
Towing eye bolt 329
Valve extractor
(C 55 AMG only) 329, 331
Vehicle jack 329
Wheel wrench 329
Vehicle washing 297
VIN 376, 403
Voice control system* 403
Hands-free microphone 29