Mercedes-Benz 2005 C 240 Operator's Manual page 94

Controls in detail
Locking and unlocking
The SmartKey will then function as
follows:
Unlocking driver's door and fuel filler
flap
Press button Πonce.
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 button Πtwice.
All turn signal lamps flash once. The
locking knobs in the doors move up.
The anti-theft alarm system* is
switched off.
92
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 buttons Œ and ‹
simultaneously for about six seconds
until battery check lamp 4 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 93) and replace
them if necessary ( page 331).
Use the mechanical key to unlock
the driver's door ( page 326).
Use the mechanical key to lock the
driver's door ( page 327).
Have the vehicle battery and the
battery connections checked
( page 347).
If the SmartKey is malfunctioning,
contact an authorized Mercedes-Benz
Center.