Mercedes-Benz C-Class Operator's Manual page 91

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
i
You can also activate and deactivate the
automatic locking function via COMAND or
Audio 20 (see the Digital Operator's Manual).
Unlocking/locking driver's door with
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 unlock: turn the mechanical key counter-
X
clockwise as far as it will go to position 1.
To lock: turn the mechanical key clockwise as
X
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 79).
Y
Trunk
Important safety notes
G
WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter the vehicle interior if the
trunk lid is open when the engine is running,
Trunk
89
Z