2008 MERCEDES-BENZ CLK63AMG key battery

Contents
Resetting activated head restraints ... 440
Resetting
activated head restraints.............. 440
Replacing SmartKey batteries ............ 441
SmartKey / SmartKey
with KEYLESS-GO* ....................... 442
Replacing bulbs ................................. 443
Bulbs ............................................ 444
Replacing bulbs for front lamps.... 446
Replacing bulbs for rear lamps ..... 448
Replacing wiper blades ...................... 450
Removing and installing
wiper blades ................................. 450
Flat tire .............................................. 452
Preparing the vehicle.................... 452
Sealing tires with TIREFIT
(CLK 63 AMG only) ....................... 452
Mounting the Minispare wheel ..... 458
MOExtended system*................... 463
Battery ............................................... 464
Disconnecting the battery ............ 465
Removing the battery ................... 465
Charging and
reinstalling the battery ................. 466
Reconnecting the battery ............. 466
Jump starting ..................................... 467Towing the vehicle ............................. 469
Towing the vehicle ....................... 469
Installing towing eye bolt ............. 470
Fuses ................................................. 472
Fuse box
in passenger compartment .......... 472
Fuse box
in engine compartment ................ 473
Fuse box
in trunk ........................................ 474
Technical data................................. 475
Parts service ...................................... 476
Warranty coverage............................. 477
Loss of Service and Warranty
Information Booklet ..................... 477
Identification labels ........................... 478
Layout of poly-V-belt drive ................. 480
CLK 350 / CLK 550 ..................... 480
CLK 63 AMG ................................ 480
Engine................................................ 481
Rims and tires.................................... 482
Same size tires ............................. 483
Mixed size tires ............................ 484
Minispare wheel ........................... 486Electrical system ............................... 487
Main dimensions and weights ........... 488
Main dimensions .......................... 488
Weights ........................................ 488
Fuels, coolants, lubricants, etc. ......... 489
Capacities .................................... 489
Engine oils ................................... 491
Engine oil additives ...................... 491
Air conditioning refrigerant .......... 491
Brake fluid.................................... 491
Premium unleaded gasoline ......... 492
Fuel requirements ........................ 492
Gasoline additives ........................ 493
Coolants ...................................... 494
Windshield washer system
and headlamp cleaning system* .. 496
Index................................................. 497

39 Getting started
Unlocking
For more information, see “SmartKey”
(
page 100).
For information on starting the engine us-
ing the SmartKey, see “Starting with the
SmartKey” (
page 52).SmartKey with KEYLESS-GO*
Pressing the KEYLESS-GO start/stop but-
ton on the gear selector lever corresponds
to turning the SmartKey to the various
starter positions.
If you firmly depress the brake pedal dur-
ing pressing the KEYLESS-GO start/stop
button, the engine starts automatically.
You can also use the SmartKey with
KEYLESS-GO like a normal SmartKey.
KEYLESS-GO start/stop button
1USA only
2Canada only
The SmartKey with KEYLESS-GO must be
located in the vehicle.
Make sure the gear selector lever is set
toP.
Do not depress the brake pedal.
!If the SmartKey cannot be turned in the
starter switch, the battery may not be sufficient-
ly charged.

Check the battery and charge it if necessary
(
page 464).

Get a jump start (page 467).
To prevent accelerated battery discharge or a
completely discharged battery, always remove
the SmartKey from the starter switch when the
engine is not in operation.
iThe function of the SmartKey overrules the
KEYLESS-GO function.

53 Getting started
Driving
Starting difficulties
If the SmartKey is left in starter switch
position0 for an extended period of time,
it can no longer be turned in the switch. In
this case, the steering is locked.
To unlock, remove SmartKey from
starter switch and reinsert.
If the engine does not start as described,
carry out the following steps:
If you are starting the engine with the
SmartKey, turn SmartKey in starter
switch to position0 and repeat starting
procedure.
If you are starting the engine with
KEYLESS-GO*: Close any doors that
may be open to allow for better detec-
tion of the SmartKey with
KEYLESS-GO*.
Or:
Start the engine with the SmartKey as
radio signals from another source may
be interfering with the SmartKey with
KEYLESS-GO*.
Repeat the starting procedure
(
page 51).
Remember that extended starting at-
tempts can drain the battery.
Get a jump start (page 467).
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.
Contact an authorized Mercedes-Benz
Center or call Roadside Assistance.
Parking brake
1Release handle
2Parking brake pedal
Warning!G
When leaving the vehicle, always remove the
SmartKey or SmartKey with KEYLESS-GO*
from the starter switch, take it with you, and
lock the vehicle. Do not leave children unat-
tended in the vehicle, or with access to an
unlocked vehicle. Children could release the
parking brake, which could result in an acci-
dent and/or serious personal injury.


61 Getting started
Parking and locking
Releasing seat belts
Press the seat belt release button
(
page 49).
Allow the retractor to completely re-
wind the seat belt by guiding the latch
plate.
LockingExit the vehicle, take the SmartKey or
the SmartKey with KEYLESS-GO* with
you, and close all doors and the trunk
lid.iIf you hear a warning signal, you have tried
to turn off the engine while the gear selector le-
ver was not inP.
In addition, the message
Selector Lever In
Park
appears in the multifunction display.
Place the gear selector lever inP.
!Make sure the seat belt retracts fully so that
the seat belt and/or latch plate cannot get
caught or pinched in the door or in the seat
mechanism. This can damage the seat belt and
impair the effectiveness of the seat belt, and/or
cause damage to the door and/or door trim pan-
el. Such damage is not covered by the
Mercedes-Benz Limit Warranty.
Damaged seat belts must be replaced. Contact
an authorized Mercedes-Benz Center.
Warning!G
To prevent possible personal injury, always
keep hands and fingers away from the door
openings when closing the doors. Be espe-
cially careful when small children are
around.
Before closing doors, make sure there is no
possibility of someone getting caught in a
door during closing.
Warning!G
When leaving the vehicle, always remove the
SmartKey or SmartKey with KEYLESS-GO*
from the starter switch, take it with you, and
lock the vehicle. Do not leave children unat-
tended in the vehicle, or with access to an
unlocked vehicle. A child’s unsupervised ac-
cess to a vehicle could result in an accident
and/or serious personal injury.
iIf you hear a warning signal you have
forgotten to switch off the low beam headlamps
or the parking lamps before opening the driver’s
door.
In addition the message
Switch Off Lights
appears in the multifunction display.
Switch off the low beam headlamps or the park-
ing lamps.
If the message
Switch Off Lights or Re-
move Key
appears in the multifunction display
remove the SmartKey from the starter switch or
switch off the automatic headlamp mode.
!Failure to switch off the exterior lamps when
leaving the vehicle may result in a discharged
battery.
iOpening a door causes the windows on that
side of the car to open slightly. They will return to
the up position when the door is closed.

97 Safety and Security
Anti-theft systems
Anti-theft systems
Immobilizer
The immobilizer prevents unauthorized
persons from starting your vehicle.
When leaving the vehicle, always take the
SmartKey or SmartKey with KEYLESS-GO*
with you and lock the vehicle. The engine
can be started by anyone with a valid
SmartKey or SmartKey with KEYLESS-GO*
that is left inside the vehicle.
Activating
With the SmartKey
Remove the SmartKey from the starter
switch.
With KEYLESS-GO*
Turn off the engine by means of the
start/stop button (
page 39) on the
gear selector lever.
Open the driver’s door.Deactivating
With the SmartKey
Insert the SmartKey in the starter
switch.
With KEYLESS-GO*
Switch on the ignition (page 40).
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

the hood
The alarm will stay on even if the activating
element (e.g. a door) is immediately
closed.
The alarm system will also be triggered
when

the vehicle is opened with the
mechanical key.

someone opens a door from the inside.

someone opens the trunk with the
emergency release button.
iStarting the engine will also deactivate the
immobilizer.
In case the engine cannot be started (yet the ve-
hicle’s battery is charged), the system is not op-
erational. Contact an authorized Mercedes-Benz
Center or call
1-800-FOR-MERCedes (in the USA), or
1-800-387-0100 (in Canada).

100 Controls in detail
In the “Controls in detail” section you will
find detailed information on how to oper-
ate the equipment installed in your vehicle.
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
basic functions of the vehicle, refer to the
“Getting started” section of this manual.
The corresponding page numbers are
given at the beginning of each segment.
Locking and unlocking
For more information on locking and
unlocking, see “Getting started”
(
page 36) and (page 59).
SmartKey
Your vehicle comes supplied with two
SmartKeys, each with remote control and
a removable mechanical key.
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

the glove box
SmartKey with remote control
1‹Lock button
2Š Opening button for trunk
(
page 103)
3Mechanical key locking tab
4ΠUnlock button
5Battery check lamp
6Â Panic button (
page 89)
!To prevent possible malfunction, avoid ex-
posing the SmartKey to high levels of electro-
magnetic radiation.

101 Controls in detail
Locking and unlocking
Opening a door causes its windows to
open slightly. It will fully close when the
door is shut.
Warning!G
When leaving the vehicle, always remove the
SmartKey from the starter switch, take it
with you, and lock the vehicle. Do not leave
children unattended in the vehicle, or with
access to an unlocked vehicle. It is possible
for children to open a locked door from the
inside, which could result in an accident
and/or serious personal injury.
!A side window will not work if it is blocked
with ice or if the battery needs charging. If you
cannot shut a door, do not force it or you could
damage the door or the side window. Fix whatev-
er is affecting the window before trying to shut
the door.
iUSA only:
This device complies with Part 15 of the
FCC Rules. Operation is subject to the following
two conditions:
(1) This device may not cause harmful interfer-
ence, and
(2) this device must accept any interference
received, including interference that may
cause undesired operation.
Any unauthorized modification to this device
could void the user’s authority to operate the
equipment.
iCanada only:
This device complies with RSS-210 of Industry
Canada. Operation is subject to the following
two conditions:
(1) This device may not cause interference, and
(2) this device must accept any interference
received, including interference that may
cause undesired operation of the device.
Any unauthorized modification to this device
could void the user’s authority to operate the
equipment.
iYou can also open and close the windows
(
page 253) and the tilt/sliding sunroof*
(
page 257) or the soft top (page 263) using
the SmartKey.
!If you can no longer lock or unlock the vehi-
cle with the SmartKey, then the batteries in the
SmartKey are discharged, the SmartKey is mal-
functioning or the vehicle battery is drained.

Check the batteries in the SmartKey
(
page 108) and replace them if necessary
(
page 441).

Use the mechanical key to unlock the driv-
er’s door (
page 427) and the trunk
(
page 428).

Use the mechanical key to lock the driver’s
door (
page 428) and the trunk
(
page 118).

Have the vehicle battery and the battery con-
nections checked (
page 464).
If the SmartKey is malfunctioning, contact
Roadside Assistance or an authorized
Mercedes-Benz Center.

102 Controls in detail
Locking and unlocking
Factory setting
Global unlocking
Press buttonŒ.

All turn signal lamps flash once.

An acoustic signal sounds once.

The locking knobs in the doors
move up.

The anti-theft alarm system is dis-
armed.
The vehicle will lock again automatically
and rearm 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
activated
Global locking
Press button‹.
With the trunk and both doors closed:

All turn signal lamps flash three
times.

An acoustic signal sounds three
times.

The locking knobs in the doors
move down.

The anti-theft alarm system is
armed.
Selective setting
If you frequently travel alone, you may wish
to reprogram the SmartKey so that press-
ing buttonŒ only unlocks the driver’s
door and the fuel filler flap.
Press and hold buttonsŒ and‹
simultaneously for about 5 seconds un-
til battery check lamp5 (
page 100)
flashes twice.
The SmartKey will then function as fol-
lows:
Unlocking driver’s door and fuel filler
flap
Press buttonΠonce.

All turn signal lamps flash once.

An acoustic signal sounds once.

The locking knob in the driver’s
door move up.

The anti-theft alarm system is dis-
armed.
Global unlocking
Press buttonΠtwice.

All turn signal lamps flash once.

An acoustic signal sounds once.
iWhen unlocking or locking the vehicle with
the SmartKey an acoustic signal sounds. The
acoustic signal is activated at the factory. If you
wish to deactivate the feature, or adjust its signal
volume, contact an authorized Mercedes-Benz
Center.