2002 MERCEDES-BENZ SLK 230 KOMPRESSOR change key battery

25 Central locking system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Locking and unlocking with remote control
Unlocking:
Press transmit button Œ. All turn signal lamps blink
once to indicate that the vehicle is unlocked.
The remote control can be programmed for two kinds of
unlocking modes (see below):
Selective unlocking mode –
Press transmit button Œ once to unlock driver’s door,
storage compartment in armrest, and fuel filler flap.
Press transmit button Πtwice to unlock both doors,
storage compartment in armrest, fuel filler flap, and
trunk.
Global unlocking mode –
Press transmit button Πonce to unlock both doors,
storage compartment in armrest, fuel filler flap, and
trunk.
Notes:
The presently active unlocking mode (selective or
global) can only be determined by unlocking the vehicle
with the remote control (see below for changing mode).If within 40 seconds of unlocking with the remote
control, neither door is opened, the key is not inserted
in the steering lock, or the central locking switch is not
activated, the vehicle will automatically lock.
Locking:
Press transmit button ‹ once. All turn signal lamps
blink three times to indicate that the vehicle is locked.
If the turn signal lamps do not blink, a door or trunk is
not closed properly.
Note:
If the vehicle cannot be locked or unlocked by pressing
the transmit button, then it may be necessary to change
the batteries in the remote control (if ok, battery check
lamp in transmitter will light briefly when transmitting)
or to synchronize the remote control, see page 236
and 237.
Choosing global or selective mode on remote control
Press and hold transmit buttons ‹ and Œ
simultaneously for five seconds to reprogram the
remote control. Battery check lamp will blink two times
indicating the completed mode change.

236 Remote control
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hintsCar care Index
Changing batteries in the remote control
Checking batteries
If the transmit buttonŒ or‹ is pressed longer
than 1 second, the battery check lamp in the transmitter
eye (1) lights up briefly – indicating that the batteries
are in order.
Change batteries if the battery check lamp does not light
up briefly.Changing batteries
Unfold master key from holder by pressing key release
button (2). Pull off battery cover (3).

237 Remote control
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hintsCar care Index Change batteries, inserting new ones with plus (+) side
facing up.
Press battery cover onto housing until locked in place.Important!
Batteries contain materials that can harm the
environment if disposed of improperly. Recycling of
batteries is the preferred method of disposal. For
disposal, please follow manufacturer‘s recommendation
on battery package.
Replacement Battery:
Lithium, type CR 2025 or equivalent.
Synchronizing remote control
The system may have to be resynchronized, if the
transmitter is without voltage for several minutes.
To synchronize system, aim transmitter eye at vehicle
and briefly press transmit buttonŒ or‹ twice.
Within approximately 30 seconds insert key in steering
lock and turn it to position 2.
The remote control should once again be operational.

274 Index
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car careIndex
Index
AABS (Antilock brake system) ....................................... 171
Malfunction indicator lamp ..................................... 186
Adjusting telescoping steering column ........................ 65
Air conditioner refrigerant ........................................... 268
Air pump (except SLK 32 AMG) ..................................200
Air pump (SLK 32 AMG only) ...................................... 202
Airbag deactivation system ............................................ 51
AIRBAG OFF indicator lamp ........................................ 190
Airbags .............................................................................. 54
Alarm system ............................................................. 35, 37
Antenna ........................................................................... 244
Anticorrosion / antifreeze .................. 164, 198, 266, 270
Antilock brake system (ABS) ....................................... 171
Malfunction indicator lamp ..................................... 186
Antitheft alarm system ................................................... 35
Aquaplaning ................................................................... 161
Ashtrays ...........................................................................116
Audio system .................................................................... 93
Anti-theft system ........................................................ 95
Button and soft key operation ................................... 96
Cassette mode ........................................................... 101CD changer ................................................................. 105
CD mode ..................................................................... 104
Operating and display elements ...............................94
Operating safety ..........................................................93
Operation – audio and telephone ............................. 93
Radio mode .................................................................. 99
Telephone operation ................................................. 108
Automatic central locking .............................................. 31
Automatic transmission ................................................ 147
Emergency Operation ............................................... 155
Fluid level ................................................................... 196
Program mode selector switch ................................ 154
Selector lever positions ............................................ 150
Transmission selector lever,
manually unlocking ............................................ 229
BBabySmart
TM airbag deactivation system ..................... 51
Self-test ......................................................................... 51
BAS (Brake assist system) ............................................ 169
Malfunction indicator lamp ..................................... 185
Battery ............................................................................ 220
Charge indicator lamp .............................................. 188
Recycling ....................................................................221