Mercedes-Benz E 1998 Series Operator's Manual page 34

Central locking switch
1 Locking
2 Unlocking
The central locking switch is located on
the center console.
The doors can only be locked with the
central locking switch, if the front doors
are closed.
The doors cannot be unlocked with the
central locking switch, if car was
previously locked with the remote
control.
If the car has previously been locked
with the central locking switch, only the
opened door is unlocked.
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