Master Lock System - Mercedes-Benz 380 SL Owner's Manual

Master Lock System

The master 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 simulta­
neously. 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 master 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 master
lock system is in the unlocked
position.
The trunk lid can also be unlocked
separately by turning 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 master 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 supplem entary key.
Thus, the trunk lock has been ex­
cluded from the operation of the
master lock system and cannot be
opened except with the square­
headed master key.
Keys
To reverse this, turn trunk lock
counterclockw ise back to horizontal
position of the tum bler slot with
master key. Lock will then be reen­
gaged in master lock system; that
is, it will automatically be locked or
unlocked depending on whether
the driver's door is locked or
unlocked.
The master lock system operates
on vacuum generated by the
engine. A reservoir allows the
master 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
in the normal manner. The fuel tank
filler flap, however, remains unlocked.
Note:
If the filler flap cannot be opened
when the master lock system is
unlocked, refer to "Unlocking of the
Filler Rap" (page 71).
Doors
13