Central Lock System - Mercedes-Benz 380 SL 1984 Owner's Manual

Central Lock System

The central lock 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 lock system in the
locked position, the front passenger
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
lock 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 ini­
tial position and withdraw it. To lock
the lid, close it firmly. It will then
be locked again by the central lock
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 lock system and cannot be
opened except with the square­
headed master key, that you keep
in your possession.
Keys
To reverse this, turn trunk lock
counterclockwise back to horizontal
position of the tumbler slot with
master key. Lock will then be reen­
gaged in central lock system; that
is, it will automatically be locked or
unlocked depending on whether
the driver's door is locked or un­
locked.
The central lock system operates
on vacuum generated by the en­
gine. A reservoir allows the central
lock 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 lock system is un­
locked, refer to "Unlocking of the
Filler Flap" (page 70).
Doors