2008 MERCEDES-BENZ C300 4MATIC Instrument

403 Practical hints
What to do if …?
Display Possible cause/consequencePossible solution
•Coolant Low
Stop Vehicle!
Turn Engine OffThe poly-V-belt could be broken.Stop the vehicle in a safe location or as soon
a s it is sa fe t o do so and im media tely turn off
the engine.
Check the poly-V-belt.
If it is broken:
Do not continue to drive. Otherwise the en-
gine will overheat due to an inoperative water
pump which may result in damage to the en-
gine.
Notify an authorized Mercedes-Benz Center.
If it is intact:
Do not continue to drive the vehicle with this
message displayed. Doing so could result in
serious engine damage that is not covered by
the Mercedes-Benz Limited Warranty.
Observe the coolant temperature gauge in
the instrument cluster (
page 26).
(Continued on next page)

404 Practical hints
What to do if …?
Display Possible cause/consequencePossible solution
•Coolant Low
Stop Vehicle!
Turn Engine OffRestart the engine.
If this message disappears from the multi-
function display:
Drive immediately to the nearest autho-
rized Mercedes-Benz Center.
If this message does not disappear from the
multifunction display:
Call Roadside Assistance.
•The cooling fan for the coolant is malfunc-
tioning.Observe the coolant temperature gauge in
the instrument cluster (
page 26).
Have the fan replaced as soon as possible.

409 Practical hints
What to do if …?
ITake Your Key
From IgnitionYou have forgotten to remove the
SmartKey.Remove the SmartKey from the starter
switch.
.AUTO Lamp Function
InoperativeThe light sensor is malfunctioning. Daytime
driving lamps are switched on.In the instrument cluster control system, set
lamp operation to manual mode.
Switch on headlamps using the exterior lamp
switch.
Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
Check
Center Brake LampThe high mounted brake lamp is malfunc-
tioning. This message will only appear if all
light emitting diodes have stopped working.Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
Check
Left Brake LampThe left brake lamp is malfunctioning.Replace the bulb as soon as possible
(
page 436).
Check
Right Brake LampThe right brake lamp is malfunctioning.Replace the bulb as soon as possible
(
page 436).
Display Possible cause/consequencePossible solution

490 Index
Dual-zone automatic climate
control 250
Front defroster 255
Rear climate control 268
Rear window defroster 256, 265
Residual engine heat and
ventilation 266
Setting the temperature 262
Temperature 253
Windshield, defogging 255
Clock 151
Setting time 170
Cockpit 24
Cold weather performance 483
COMAND* see separate COMAND
operating instructions
Combination switch 112
Corner-illuminating front fog
lamps* 112
High beam flasher 112
Turn signals 131
Windshield wipers 117
Control system 151
Multifunction display 151
Multifunction steering wheel 152
Resetting to factory default 165Control system menu 151
AUDIO 158
Menus overview 154
Navi* 158
Service menu 164
Settings menu 165
Standard display 156
TEL* 160
Trip computer 156
Vehicle status message
memory 164
Control system submenus 153, 155
Convenience 174
Instrument cluster 168
Lighting 171
Time/Date 170
Vehicle 173
Coolant 329
Adding 329
Anticorrosion/antifreeze mixing ratio
and quantity 484
Checking level 329
Messages in display 405
Temperature 321
Temperature gauge 27, 148Coolant level
Checking 329
Corner-illuminating front fog lamps* 112
Replacing bulbs 431
Cruise control 241
Activating 242
Canceling 243
Driving downhill 243
Driving uphill 243
Setting current speed 242
Setting to last stored speed
(“Resume” function) 245
Cruising range, fuel 483
Cup holder
In front seat armrest 287
In rear seat armrest 287
Curb weight 356

492 Index
Dual-zone automatic climate control
Maximum cooling MAX COOL 256
Dual-zone automatic climate control see
Climate control system
E
Easy-entry/exit feature*
(Canada only) 95, 174
EBP 61
Electrical fuses see Fuses
Electrical outlet
Glove box 293
Rear passenger compartment 293
Electrical system, Technical Data 473
Electronic Brake Proportioning see EBP
Electronic Stability Program see ESP
®
Electronic traction system 63
Emergency call system 295
Emergency calls, Tele Aid* 296
Emergency operation (Limp-Home
Mode) 146Emergency operations
Gear selector lever*, Unlocking 426
Locking the vehicle 424
Releasing from inside 271
Remote door lock* 302
Remote door unlock* 301
Unlocking the trunk 425
Unlocking the vehicle 424
Emergency tensioning device see ETD
Emergency, In case of
Battery, Jump starting 451
First aid kit 420
Flat tire 440
Fuses 456
Instrument cluster, Indicator
lamps 374–383
Roadside Assistance 12
Roadside Assistance* (Tele
Aid*) 299
Towing the vehicle 453
Emission control 320
Emission control information label 463
Emission control system warranties 10Engine
Adding engine oil 328
Belt layout 464
Cleaning 366
Compartment 325
Coolant 329, 478, 484
Malfunction indicator lamp 27, 378
Number 462, 463
Oil 327, 476, 480
Residual heat and ventilation 266
Starting 127
Technical data 465
Turning off 134
Engine coolant see Coolant
Engine oil 327
Adding 328
Additives 480
Checking level (Dipstick) 327
Consumption 327
Dipstick 327
Filler neck 327, 328
Recommended engine oils and oil
filters 476

495 Index
H
Halogen headlamp see Headlamps
Hands-free microphone 31
Hard plastic trim items, cleaning 370
Hazard warning flasher 114
Head restraints 89
Active head restraints 50
Adjustment 89
Front seat 89
Rear seat, Removing and
installing 90
Resetting activated active head
restraints 427
Headlamp cleaning system 112, 330
Washer fluid 479, 486
Headlamps
Automatic control 109
Automatic headlamp mode 172
Cleaning lenses 367
Cleaning system 330
Halogen 432
Manual headlamp mode 172
Messages in display 411
Refilling washer fluid 330
Replacing bulbs 431, 432Headliner and shelf below rear window,
Cleaning and care of 371
High beam flasher 112
Replacing bulbs (Bi-Xenon*) 431,
435
Replacing bulbs (Halogen) 431, 433
High beam headlamps
Indicator lamp 27
Replacing bulbs (Bi-Xenon*) 431
Replacing bulbs (Halogen) 431, 433
Replacing bulbs for high beam flasher
(Bi-Xenon*) 435
High mounted brake lamp 431
Hood 325
Message in display 406
Opening 325
Horn 25
Hot weather performance 483
HVAC see Climate control system
Hydroplaning 315I
Identification labels 462
Identification Number, Vehicle (VIN) 463
Ignition 82, 84, 127
Switching on 82
Switching on, KEYLESS-GO* 84
Immobilizer 66
Infant and child restraint systems see Chil-
dren in the vehicle
Inside door handle 79
Instrument cluster 26, 147
Coolant temperature gauge 27, 148
Fuel gauge 27, 150
Illumination 148
Lamps 374
Multifunction display 151
Outside temperature indicator 149
Setting the language (Audio
system) 193
Interior lighting 114
Activating automatic control 115
Deactivating automatic control 115
Delayed shut-off 173
In the rear 116
Reading lamps in the front 115, 116
Reading lamps in the rear 116

497 Index
L
Labels 462
Certification 462
Emission control information 463
Tire and Loading Information 335
Lamps, exterior 431
Light sensor 409
Lamps, indicator and warning
ABS 27, 59, 374
Air bag Off 40
Battery check lamp (SmartKey with
KEYLESS-GO* 77
Battery check lamp (SmartKey) 72
Brake warning lamp 27
Brakes 376
Engine diagnostics 27, 378
Engine malfunction 27, 378
ESP
®27, 376, 379, 380
Front passenger front air bag off 29,
45, 385, 386
Fuel reserve 380
High beam headlamps 27
Instrument cluster 374–383
Maintenance service indicator 362
Seat belt telltale 27, 380
SRS 27, 382Turn signals 27
Language 193
Language, Setting 168
LATCH-type child seat anchors see
Children in the vehicle
Lever
For cruise control 242
License plate lamps
Messages in display 411
Replacing bulbs 431, 437
Light alloy wheels, Cleaning 370
Light sensor
Message in display 409
Lighter see Cigarette lighter
Lighting 108
Automatic headlamp mode 109
Corner-illuminating front fog
lamps* 112
Daytime running lamp mode 110
Door entry lamps 116
High beam flasher 112
Instrument cluster illumination 148
Interior 114
Manual headlamp mode 108
Trunk 116
Limp-home mode 146Loading see Vehicle loading
Locator lighting 172
Lock button
Door handle (KEYLESS-GO*, Canada
only) 76, 125
Key, SmartKey 70
Key, SmartKey with KEYLESS-GO*
(Canada only) 73
Locking 133
Vehicle in an emergency 425
Locking knob 79
Loss of
Key, Mechanical 79
Key, SmartKey 79
Key, SmartKey with KEYLESS-GO*
(Canada only) 79
Service and Warranty Information
Booklet 461
Low beam headlamps
Replacing bulbs (Bi-Xenon*) 431
Replacing bulbs (Halogen) 431, 433
Lowering
Vehicle 445
Lubricants 476
Lumbar support* 91

504 Index
services 302
System self-check 296
Telephone* 28, 152
“911” emergency call
(Audio system) 231
Answering/ending a call 163
Hands-free microphone 31
Operation 160
Operation (Audio system) 222
Phone book 162
Redialing 163
Redialing (Instrument cluster control
system) 163
Switching on/off (Audio system) 226
Temperature
Display mode 158
Interior temperature 253
Outside temperature indicator 27
Tires 340
Tightening torque, Wheel bolts 445
Tilt/sliding sunroof see Power tilt/sliding
sunroof
Time 170
TIN 358
Tire and Loading Information
Placard 335Tire Identification Number see TIN
Tire inflation pressure
Air pressure 339, 356
Checking tire pressure electronically,
Tire Pressure Monitoring System
(TPMS), (USA only) 344
Tires 331
And Rims 467
And Wheels 331
Care and maintenance 332
Chains 361
Cleaning 333
Cold tire inflation pressure 356
Direction of rotation 334
Driving instructions 315
Important notes on tire inflation
pressure 340
Inflation pressure 339
Information placard 335
Inspection 332
Load rating 349, 358
Load rating, Maximum 353, 357
Low tire pressure telltale 383
Minispare wheel 422, 471
Ply composition and material
used 358Problems under-/overinflation 339
Retreads 331
Rotating 359
Run Flat Indicator*
(Canada only) 342
Service life 332
Sizes 467
Snow 360
Speed rating 316, 350, 358
Storing 333
Temperature 340, 355
Terminology 356
Tire Pressure Monitoring System
(TPMS)*, (USA only) 344
Total load limit 358
TPMS* (USA only) malfunction
telltale 383
Traction 316, 358
Tread depth 333
Tread depth, Winter 360
Treadwear indicators 358
Vehicle maximum load on 359
Wear pattern 359
Winter 360