Mercedes-Benz C-CLASS Operator's Manual page 86

Doors
84
If a locked door is opened from the inside, the
previous unlock status of the vehicle will be
taken into consideration if:
the vehicle was locked using the locking but-
R
ton for the central locking, or
if the vehicle was locked automatically
R
The vehicle will be fully unlocked if it had previ-
ously been fully unlocked. If only the driver's
door had been previously unlocked, only the
door which has been opened from the inside is
unlocked.
Automatic locking feature
To deactivate: press and hold button : for
X
approximately five seconds until a tone
sounds.
To activate: press and hold button ; for
X
approximately five seconds until a tone
sounds.
If you press one of the two buttons and do not
hear a tone, the relevant setting has already
been selected.
The vehicle is locked automatically when the
ignition is switched on and the wheels are turn-
ing.
You could therefore be locked out if:
the vehicle is being pushed.
R
the vehicle is being towed.
R
the vehicle is on a roller dynamometer.
R
You can activate and deactivate the automatic
locking mechanism via the multimedia system
(see the Digital Operator's Manual).
Locking/unlocking the driver's door
with the mechanical key
i
If you want to centrally lock the vehicle using
the mechanical key, begin by pressing the
locking button for the interior locking mech-
anism while the driver's door is open. Then
lock the driver's door using the mechanical
key.
Insert the mechanical key into opening : in
X
the protective cap.
Pull and hold the door handle.
X
Pull the protective cap on the mechanical key
X
as straight as possible away from the vehicle
until it releases.
Release the door handle.
X
To lock: turn the mechanical key clockwise as
X
far as it will go to position 1.
To unlock: turn the mechanical key counter-
X
clockwise as far as it will go to position 1.
If you use the mechanical key to unlock and
open the driver's door, the anti-theft alarm sys-
tem will be triggered. Switch off the alarm
( page 75).
Y