2005 MERCEDES-BENZ C320 key battery

Contents
Practical hints................................ 301
What to do if … .................................. 302
Lamps in instrument cluster ........ 302
Lamp in center console................ 308
Vehicle status messages in the
multifunction display .................... 309
Where will I find ...? ........................... 329
First aid kit ................................... 329
Vehicle tool kit ............................. 329
Minispare wheel
(except C 55 AMG)....................... 333
Collapsible tire
(C 55 AMG only)........................... 334
Spare wheel bolts ........................ 336
Unlocking/locking in an emergency .. 337
Unlocking the vehicle ................... 337
Locking the vehicle ...................... 338
Fuel filler flap ............................... 339
Manually unlocking the
transmission gear selector lever .. 340
Opening/closing in an emergency..... 341
Power tilt/sliding sunroof* .......... 341Replacing SmartKey batteries ............ 342
SmartKey ...................................... 343
Replacing bulbs .................................. 344
Bulbs ............................................. 344
Replacing bulbs for front lamps .... 347
Replacing bulbs for rear lamps ..... 351
Replacing wiper blades....................... 352
Removing wiper blades ................. 352
Installing wiper blades .................. 352
Flat tire ............................................... 353
Preparing the vehicle .................... 353
Mounting the spare wheel ............ 353
Battery................................................ 360
Disconnecting the battery............. 361
Removing the battery.................... 361
Charging and reinstalling
the battery .................................... 361
Reconnecting the battery.............. 362Jump starting...................................... 363
Towing the vehicle.............................. 365
Installing towing eye bolt .............. 368
Fuses.................................................. 369
Aids for changing fuses ................ 369
Main fuse box in passenger
compartment ................................ 370
Fuse box in engine
compartment ................................ 370
Fuse box in trunk .......................... 371

34 Getting startedUnlocking
iWhen you switch on the ignition, the
indicator and warning lamps in the
instrument cluster come on. This indi-
cates that the respective systems are
operational. They should go out when
the engine is running.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 360).


Get a jump start (
page 363).
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.

47 Getting started
Driving
Automatic transmission*Gearshift pattern for automatic
transmissionPPark position with gear selector lever
lock
RReverse gear
NNeutral
DDrive position
For more information, see “Automatic
transmission*” (
page 156).Starting

Make sure the gear selector lever is set
toP.

Do not depress the accelerator.

Turn the SmartKey in the starter switch
to position3 and hold until the engine
starts (
page 33).

Depress the brake pedal.
The gear selector lever lock is released.
For information on turning off the engine,
see “Turning off engine” (
page 56).Starting difficulties
If the engine does not start as described,
carry out the following steps:

Turn the SmartKey in the starter switch
to position0 and repeat starting
procedure (
page 46).
Remember that extended starting
attempts can drain the battery.

Get a jump start (
page 363).
If the engine does not start after several
starting attempts, there could be a mal-
function in the engine electronics or in the
fuel supply system.

Notify an authorized Mercedes-Benz
Center.
iYou can also use the “touch-start”
function. Turn the SmartKey in the
starter switch to position3 and release
it again immediately. The engine then
starts automatically.

83 Safety and Security
Anti-theft systems
Anti-theft systems
Immobilizer
The immobilizer prevents unauthorized
persons from starting your vehicle.
Activating
Remove the SmartKey from the starter
switch.
Deactivating

Switch on ignition (
page 33).
Anti-theft alarm system*
Once the alarm system has been armed, a
visual and audible alarm is triggered when
someone opens

a door


the trunk lid


the hood
The alarm system will also be triggered
when


someone attempts to raise the vehicle
(page 85)


opening the vehicle with the
mechanical key
iStarting the engine will also deactivate
the immobilizer.
In case the engine cannot be started
(yet the vehicle’s battery is charged),
the system is not operational. Contact
an authorized Mercedes-Benz Center
or call 1-800-FOR-MERCedes (in the
USA), or 1-800-387-0100 (in Canada).
iThe alarm will stay on, even if the
activating element (a door, for
example) is immediately closed.iIf the alarm stays on for more than
30 seconds, a call to the Response
Center is initiated automatically by the
Tele Aid system* (
page 248) provid-
ed Tele Aid service was subscribed to
and properly activated, and that neces-
sary cellular service and GPS coverage
are available.

88 Controls in detailIn the “Controls in detail” section you will
find detailed information on how to oper-
ate the equipment installed on your vehi-
cle. If you are already familiar with the
basic functions of your vehicle, this section
will be of particular interest to you.
To quickly familiarize yourself with the ba-
sic functions of the vehicle, refer to the
“Getting started” section of this manual.
The corresponding page numbers are giv-
en at the beginning of each segment.Locking and unlocking
For more information on locking and
unlocking, see “Getting started”
(page 32) and (
page 54).
SmartKey
Your vehicle comes supplied with two
SmartKeys, each with remote control and
a removable mechanical key.
The locking tabs for the mechanical key
portion of the two SmartKeys are a
different color to help distinguish each
SmartKey unit.
The SmartKey provides an extended oper-
ating range. To prevent theft, however, it is
advisable to only unlock the vehicle when
you are in close proximity to it.
The SmartKey centrally locks and unlocks:

the doors


the trunk


the fuel filler flap
SmartKey with remote control1‹ Lock button
2Š Opening button for the trunk lid
3Mechanical key locking tab
4ΠUnlock button
5Battery check lamp
6Â Panic button* (
page 76).
iCanada only:
Only vehicles equipped with an
anti-theft alarm system* have
SmartKeys with integrated panic
button6.

89 Controls in detail
Locking and unlocking
Factory setting
Global unlocking
Press buttonŒ.
All turn signal lamps flash once. The
locking knobs in the doors move up.
The anti-theft alarm system* is
switched off.
The vehicle will lock again automatically
and reactivate the anti-theft alarm
system* within approximately 40 seconds
of unlocking if:


neither door nor trunk is opened


the SmartKey is not inserted in the
starter switch


the central locking switch is not
activatedGlobal locking

Press button‹.
All turn signal lamps flash three times.
The locking knobs in the doors move
down. The anti-theft alarm system* is
activated.
Selective setting
If you frequently travel alone, you may wish
to reprogram the SmartKey so that
pressingŒ only unlocks the driver’s
door and the fuel filler flap.

Press and hold buttonsŒ and‹
simultaneously for about five seconds
until battery check lamp5 flashes
twice.
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. It is possible for children to
open a locked door from the inside, which
could result in an accident and/or serious
injury.!To prevent possible malfunction, avoid
exposing the SmartKey to high levels of
electromagnetic radiation.iYou can also open and close the power
windows (
page 225) and power
tilt/sliding sunroof* (
page 229) from
outside using the SmartKey.


90 Controls in detailLocking and unlocking
The SmartKey will then function as
follows:
Unlocking driver’s door and fuel filler
flap

Press buttonΠonce.
All turn signal lamps flash once. The
locking knob in the driver's door moves
up. The anti-theft alarm system* is
switched off.
Global unlocking

Press buttonΠtwice.
All turn signal lamps flash once. The
locking knobs in the doors move up.
The anti-theft alarm system* is
switched off.Global locking

Press button‹.
All turn signal lamps flash three times.
The locking knobs in the doors move
down. The anti-theft alarm system* is
activated.
Restoring to factory setting

Press and hold buttonsŒ and‹
simultaneously for about six seconds
until battery check lamp5 flashes
twice.
!If you can no longer lock or unlock the
vehicle with the SmartKey, then either
the batteries in the SmartKey are dis-
charged, the SmartKey is malfunction-
ing or the vehicle battery is drained.

Check the batteries in the
SmartKey (
page 91) and replace
them if necessary (
page 343).


Use the mechanical key to unlock
the driver’s door (
page 337) and
the trunk lid (
page 338).


Use the mechanical key to lock the
driver’s door (
page 338).


Have the vehicle battery and the
battery connections checked
(page 360).
If the SmartKey is malfunctioning,
contact an authorized Mercedes-Benz
Center.


91 Controls in detail
Locking and unlocking
Checking the batteries
Press button‹ orŒ.
Battery check lamp5 comes on
briefly to indicate that the SmartKey
batteries are in order.Unlocking and opening the trunk lid
You can unlock and open the trunk
separately.
A minimum height clearance of 5.71 ft
(1.74 m) is required to open the trunk lid.

Press buttonŠ until trunk lid
unlocks and begins to open.Loss of SmartKey or mechanical key
If you lose a SmartKey or mechanical key,
you should do the following:

Have the SmartKey deactivated by an
authorized Mercedes-Benz Center.

Report the loss of the SmartKey or the
mechanical key immediately to your
car insurance company.

If necessary, have the mechanical lock
replaced.
Your authorized Mercedes-Benz Center
will be glad to supply you with a replace-
ment.
iIf battery check lamp5 does not
come on briefly during check, then the
SmartKey batteries are discharged.
Replace the batteries (
page 343).
You can obtain the required batteries
at any authorized Mercedes-Benz
Center.
iIf the batteries are checked within
signal range of the vehicle, pressing
the‹ orŒ button will lock or
unlock the vehicle accordingly.
!The trunk lid swings open upwards
automatically. Always make sure there
is sufficient overhead clearance.