Central Locking System - Mercedes-Benz 420 SEL 1989 Owner's Manual

Central Locking System

The entire vehicle may be locked or
unlocked with the central locking
system by:
• Using the master or valet key in
either front door.
• Using the master key in the trunk
lock.
• By pushing down or pulling up the
interior door lock button at either
front door.
The central locking system locks or
unlocks all doors, trunk lid and fuel
filler flap simultaneously.
Doors
When you lock the car, all door lock
buttons should move down. If any one
stays up, the respective door is not
properly closed. You should then un­
lock the car, open and reclose this
door, and lock the car again.
The central locking system can be en­
gaged from the driver-side door lock
button, provided the door is com­
pletely closed. It can also be engaged
from the passenger-side if the ignition
key is removed, or the key is inserted
in the steering lock without being
turned (key in position 0).
If the car has been locked from the
outside, the anti-theft alarm will come
on if a door is opened from the inside.
Trunk
To unlock the trunk with the central
locking system, turn the master key in
the trunk lock completely to the left
and let it return to the vertical posi­
tion. Push in trunk lock button and
open the trunk. To lock the trunk, turn
the master key completely to the right
and let it return to the vertical posi­
tion.
The trunk can remain locked while the
central locking system is unlocked
(e.g. while driving or when leaving the
car in a situation where it must be
driven using the valet key, but you
wish the trunk to remain locked at
parking lots, workshops, etc.). Turn
the master key completely to the right
and pull it out in the horizontal posi­
tion. Now the trunk can only be un­
locked with the master key by turning
it back completely to the left.
Important!
If the trunk is unlocked with the mas­
ter key, the doors and fuel filler flap
will also be unlocked. After closing
the trunk, the central locking system
must again be engaged using the key
to relock the doors and fuel filler flap.
Note:
If the fuel filler flap cannot be
opened, refer to " Manual Release of
Fuel Filler Flap" (page 89).