Central Locking System - Mercedes-Benz 380 SL 1985 Owner's Manual

Central Locking System

The central locking system enables
the front passenger door, the fuel
tank filler flap and the trunk lid to
be locked or unlocked together
with the driver's door. When locking
or unlocking, the locking levers on
both doors must move simul­
taneously. If one locking lever fails
to do so, the lock of that particular
door is not properly engaged. The
door must then be opened and
closed correctly.
With the central locking system in
the locked position, the front pas­
senger door can be locked and
unlocked either with the locking
lever or with the key.
Actuation of the locking lever on
the front passenger door, however,
is not possible when the central
locking system is in the unlocked
position.
The trunk lid can also be unlocked
separately by turning the master
key counterclockwise to the stop.
Push the trunk lock button in with it
and lift the lid. Return the key to its
initial position and withdraw it. To
lock the lid, close it firmly. It will
then be locked again by the central
locking system.
A provision has been made to faci­
litate permanent locking of the
trunk lid for positive prevention of
access to trunk by unauthorized
persons.
Before leaving vehicle with an
attendant, lock trunk with master
key (square head) by turning key
clockwise to stop (tumbler slot ver­
tical), then provide attendant with
round-headed supplementary key.
Thus, the trunk lock has been ex­
cluded from the operation of the
central locking system and cannot
be opened except with the square­
headed master key, that you keep
in your possession.
Keys Doors
To reverse this, turn trunk lock
counterclockwise back to horizontal
position of the tumbler slot with
master key. Lock will then be re­
engaged in central locking system;
that is, it will automatically be
locked or unlocked depending on
whether the driver's door is locked
or unlocked.
The central locking system ope­
rates on vacuum generated by the
engine. A reservoir allows the cen­
tral locking system to be actuated
about five times after the engine is
turned off. If the system can then
no longer be engaged, idle engine
for a short period.
If no vacuum is available, doors and
trunk have to be locked individually
with the key. The fuel tank filler flap,
however, remains unlocked.
Note:
If the filler flap cannot be opened
when the central locking system is
unlocked, refer to "Unlocking of the
Filler Rap" (page 76).