Central Lock System - Mercedes-Benz 300 D 1984 Owner's Manual

Central Lock System

The central lock system sim ulta­
neously locks or unlocks together
w ith 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 m ust 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 lock system has
been engaged, the lock buttons of
the fron t passenger door and the rear
doors can also be operated manually
from inside. In addition to this, the
fro nt passenger d oor can be locked
or unlocked by means of the master
key.
The central lock 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
counterclockw ise to the stop. Push
the trunk lock button in with it and lift
the lid. Return the key to its initial
position and w ithdraw 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
facilitate perm anent locking of the
trunk lid fo r positive prevention of
access to trunk by unauthorized
persons.
Before leaving vehicle with an attend­
ant, lock tru nk with master key
(square head) by turning key clo ck­
wise to stop (tum bler slot vertical),
then provide attendant with round-
headed supplem entary key. Thus, the
tru n k lock has been excluded from
the operation of the central lock
system and cannot be opened except
with the squareheaded master key
that you keep in your possession.
To reverse this, turn trunk lock
counterclockw ise back to horizontal
position of the tum bler slot with
master key. Lock will then be
Keys
re-engaged in central lock system ;
that is, it will autom atically be locked
o r unlocked depending on whether
the d rive r's door is locked or
unlocked.
The central lock system operates on
vacuum generated by the engine. A
reservoir allows the central lock
system to be actuated about five
tim es after the engine is turned off. If
the system can then no longer be
engaged, idle engine fo r a short
period.
If no vacuum is available, doors and
trun k 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
w hen the central lock system is
unlocked, refer to " Unlocking of the
Filler Flap" (page 73).
Doors