key battery MERCEDES-BENZ C320 2004 W203 User Guide

223 Controls in detail
Useful features
Tele Aid* The Tele Aid system
(Tele
matic A
larm I
dentification on
D
emand)
The Tele Aid system consists of three
types of response:

automatic and manual emergency


roadside assistance and


information
The Tele Aid system is operational provid-
ing that the vehicle’s battery is charged,
properly connected, not damaged and
cellular and GPS coverage is available.
The speaker volume of a Tele Aid call can
be adjusted when using the volume control
on the multifunction steering wheel. To
raise, press buttonæ and to lower,
press buttonç.

To activate, press the SOS button, the
Roadside Assistance button• or
the Information button¡, depend-
ing on the type of response required.Shortly after the completion of your Tele
Aid acquaintance call, you will receive a
user ID and password via first call mail. By
visiting www.mbusa.com and selecting
“Tele Aid” (USA only), you will have access
to account information, remote door
unlock, Info Services profile and more.
!The initial activation of the Tele Aid
system may only be performed by
completing the subscriber agreement
and placing an acquaintance call using
the SOS button. Failure to complete
either of these steps will result in a
system that is not activated. If the
system is not activated, the indicator
lamp in the SOS button stays on after
turning SmartKey in starter switch to
position2 and the message
TELE AID
EMERG. CALL – NOT ACTIVATED
will be
shown in the multifunction display for
approximately ten seconds.
If you have any questions regarding
activation, please call the Response
Center at 1-800-756-9018 (in the USA)
or 1-888-923-8367 (in Canada).
iThe SOS button is located above the
interior rear view mirror.
The Roadside Assistance button•
and the Information button¡ are
located below the center armrest
cover.!The Tele Aid system utilizes the cellular
network for communication and the
GPS (Global Positioning System) satel-
lites for vehicle location. If either of
these signals are unavailable, the
Tele Aid system may not function and if
this occurs, assistance must be sum-
moned by other means.

274 Practical hintsWhat to do if …
What to do if …Lamps in instrument clusterGeneral information:
If a bulb in the instrument cluster fails to
come on during the bulb self-check when turning the SmartKey in the starter switch
to position2, have it checked and replaced
if necessary.Problem
Possible cause
Suggested solution
-
The yellow ABS malfunction
indicator lamp comes on while
driving.
The ABS has detected a malfunction and has
switched off. The BAS and the ESP are also
switched off (see messages in display).
The brake system is still functioning normally
but without the ABS available.

Continue driving with added caution.
Wheels may lock during hard braking,
reducing steering capability.

Have the system checked at an autho-
rized Mercedes-Benz Center as soon
as possible.
Failure to follow these instructions
increases the risk of an accident.

Read and observe messages in the
display (
page 280).
The charging voltage has fallen below ten
volts. The ABS has switched off.

When the voltage is above this value
again, the ABS is operational again.

If necessary, have the generator
(alternator) and battery checked.

307 Practical hints
Unlocking/locking in an emergency
Changing batteries in the SmartKey
If the batteries in the SmartKey are
discharged, the vehicle can no longer be
locked or unlocked. It is recommended to
have the batteries replaced at an
authorized Mercedes-Benz Center.
Batteries contain materials that can harm
the environment if disposed of improperly.
Recycling of batteries is the preferred
method of disposal. Many states require
sellers of batteries to accept old batteries
for recycling.1Mechanical key
2Battery compartment
Replacement batteries: Lithium, type
CR 2025 or equivalent.

Remove mechanical key1
(page 305).

Insert mechanical key1 in side
opening and push grey slide.
Battery compartment2 is unlatched.

Pull battery compartment2 out of the
SmartKey housing in direction of
arrow.
3Battery
4Contact spring

Remove the batteries.

Using a lint-free cloth, insert new
batteries under contact spring with the
plus (+) side facing up.

Return battery compartment2 into
housing until it locks into place.
Warning!
G
Keep the batteries out of reach of children.
If a battery is swallowed, seek medical help
immediately.
iWhen changing batteries, always
replace both batteries.
The required replacement batteries are
available at any Mercedes-Benz
Center.


323 Practical hints
Battery
Battery
The 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.

324 Practical hintsBattery1Negative terminal
2Positive terminal cover
Disconnecting the battery
Turn off all electrical consumers.

Open the hood (
page 252).

Remove the filter box (
page 323).

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.

330 Practical hintsTowing the vehicleWarning!
G
With the engine not running, there is no
power assistance for the brake and steering
systems. In this case, it is important to keep
in mind that a considerably higher degree of
effort is necessary to brake and steer the ve-
hicle. Adapt your driving accordingly.
!When towing the vehicle with all wheels
on the ground, please note the
following:
With the automatic central locking
activated and the SmartKey in starter
switch position2, the vehicle doors
lock if the left front wheel as well as the
right rear wheel are turning at vehicle
speeds of approx. 9 mph (15 km/h) or
more.
Switch off the tow-away alarm
(page 79).
To prevent the vehicle doors from
locking, deactivate the automatic
central locking (
page 133).
Towing of the vehicle should only be
done using the properly installed
towing eye bolt. Never attach tow
cable, tow rope or tow rod to vehicle
chassis, frame or suspension parts.
iIf the battery is disconnected or
discharged

the SmartKey will not turn in the
starter switch. See notes on the
battery (
page 323) or on jump
starting (page 326).


the gear selector lever will remain
locked in positionP. See notes on
manually unlocking transmission
gear selector lever (
page 308).

370 IndexAutomatic climate control* 162
Activating 163
Adjusting air distribution 166
Adjusting air volume 166
Air recirculation mode 167
Deactivating 163
Defrosting 167
Rear window defroster 153
Residual heat utilization 171
Residual ventilation 171
Setting the temperature 165
Automatic headlamp mode 103
Automatic lighting control
Activating 107
Deactivating 107
Automatic locking when driving 90
Automatic transmission fluid see ATF
Automatic transmission* 142
Accelerator position 147
Comfort program mode 146
Emergency operation
(Limp Home Mode) 147
Fluid level 256Gear ranges 144
Gear selector lever 44
Gear selector lever position 142, 145
Gear shifting malfunctions 147
Kickdown 147
Manual shifting 143
One-touch gearshifting 143
Program mode selector switch 146
Starting with 44
Transmission fluid 256
Auxiliary fuse box 334
B
BabySmart
TM
Airbag deactivation system 66, 361
Compatible child seats 66, 361
Self-test 66
Backrest
Folding forward 213
Folding rearward 213
Backrest contour
Adjusting 97Backrest side bolsters
Adjusting 97
Backrest tilt
Manual seat 33
Power seat* 35
Backup lamps 311, 315
Bulbs 310
BAS 73, 361
Messages in display 281
Batteries, SmartKey
Changing 307
Check lamp 83
Checking 84
Battery discharged
Jump starting 326
Battery, vehicle 258, 323
Charging 324
Disconnecting 324
Messages in display 285
Reconnecting 325
Reinstalling 324
Removing 324

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

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

384 IndexMultifunction display messages
ABS 284
BAS 281
Battery, vehicle 285
Brake fluid 286
Brake pads 286
Coolant 287–289
Cruise control 290
Display 290
Doors 290
Engine oil 291–292
ESP 282–283
Fuel cap 293
Fuel reserve tank 293
Hood 293
Key, SmartKey 293
Lamps, exterior 293–296
Oil 291–292
Parking brake 286
Restraint system 297Seat belts 297
Sliding/pop-up roof* 299
SRS 297
Steering column not
properly locked 298
Steering gear oil level 298
Tele Aid* 299
Telephone* 299
Trunk lid 299
Windshield washer fluid 299
Multifunction steering
wheel 24, 114, 363
Buttons 114
N
Navigation system*
Operating 121
See separate COMAND*
operating instructions
Night security illumination 104
Setting 131O
Occupant safety 54
Airbags 55
Children and airbags 56
Children in the vehicle 63
Fastening the seat belt 40
Infant and child restraint systems 63
LATCH-type child seat anchors 69
Seat belts 40, 58
Odometer, main 23
Oil level see Engine oil level
Oil see Engine oil
One-touch gearshifting 143
Canceling gear range limit 143
Downshifting 143
Upshifting 143
Opening
Ashtray, center console 220
Ashtray, rear seat 221
Cup holder, in front of
seat armrest 217