Mercedes-Benz 300 CD-TURBO DIESEL 1985, Owner'S Manual

Page: 17 / 103

Central Locking System
The central locking system simulta­
neously locks or unlocks together
with the driver’s door all other doors,
fuel tank filler flap and trunk lid. As the
driver’s door button is moved, the
buttons of all other doors must move
at the same time. If this is not the
case, the lock of the corresponding
door has not engaged fully. Open the
door once more and close it correctly.
When the central locking system has
been engaged, the lock buttons of
the front passenger door and the rear
doors can also be operated manually
from inside. In addition to this, the
front passenger door can be locked
or unlocked by means of the master
key.
The central locking system can only
be engaged by depressing the button
on the driver’s door. Lock buttons of
the other doors cannot be depressed
individually.
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
facilitate permanent locking of the
trunk lid for positive prevention of
access to trunk by unauthorized
persons.
Before leaving vehicle with an attend­
ant, lock trunk with master key
(square head) by turning key clock­
wise to stop (tumbler slot vertical),
then provide attendant with round-
headed supplementary key. Thus, the
trunk lock has been excluded from
the operation of the central locking
system and cannot be opened except
with the squareheaded master key
that you keep in your possession.
To reverse this, turn trunk lock
counterclockwise back to horizontal
position of the tumbler slot with
master key. Lock will then be
Keys Doors
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 operates
on vacuum generated by the engine.
A reservoir allows the central 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
using a key or depressing the button.
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 Flap” (page 77).