Mercedes-Benz 2000 C-Class - Manual (Page 22)

Locking and Unlocking
Unlocking:
Press transmit button
. All turn signal lamps blink once to indicate that the vehicle is unlocked.
The remote control can be programmed for two kinds of unlocking methods (see below):
Selective unlocking mode:
Press transmit button
once to unlock driver's door and fuel filler flap.
Press transmit button twice to unlock doors, fuel filler flap, and trunk.
Global unlocking mode:
Press transmit button
once to unlock doors, fuel filler flap, and trunk.
Notes:
If the trunk was previously locked separately, it will remain locked (see Index). 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). The vehicle is automatically locked again, if within 40
seconds of unlocking with the remote control, neither door or trunk is opened, the electronic key is
not inserted in the steering lock, or the central locking switch is not activated.
Locking:
Press transmit button
once. All turn signal lamps blink three times to indicate that the vehicle is
locked
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 transmitter (if ok, battery check lamp in transmitter will light briefly
when
transmitting) or to synchronize the system, see Remote Control in Index.
Choosing Global or Selective Mode on Remote Control
Press and hold transmit buttons
and simultaneously for five seconds to reprogram the
remote control. Battery check lamp will blink two times indicating the completed mode change.