Mercedes-Benz M-Class 2007 Owners Manual - Manual (Page 128)

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Controls in detail
Locking and unlocking
The switches are located in the front-door
control panels.
1 Central unlocking switch
2 Central locking switch
Locking
̈ Press central locking switch 2.
If all doors and the tailgate are closed,
the vehicle locks.
Unlocking
̈ Press central unlocking switch 1.
The vehicle unlocks.
i You can open a locked door from the inside.
Open door only when conditions are safe to do
so.
If the vehicle was previously centrally locked
with the SmartKey or the SmartKey with
KEYLESS-GO*, it will not unlock using the central
unlocking switch
1.
If the vehicle was previously locked with the
central locking switch
2:
ț While in the selective remote control mode,
only the front door opened from the inside is
unlocked.
ț While in the global remote control mode, the
vehicle is unlocked completely when a front
door is opened from the inside.
i With the passenger-side door opened, you
cannot lock the vehicle with the central locking
switch.