Mercedes-Benz 300 TD-TURBO DIESEL 1982 Owner's Manual page 20

123 t
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Keys
Doors
Master Lock System
The master lock system will lock or
unlock the vehicle doors and the tank
filler flap whenever the driver's door is
locked or unlocked.
As the driver's door plunger is
moved, the plungers 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.
With the master lock system engaged
the safety plungers of the front
passenger door, the rear doors and
the tailgate can also be actuated
manually. The front passenger door
and the tailgate can in addition be
locked and unlocked with the key.
The master lock system can only be
applied by depressing the plunger of
the driver's door. Lock plungers of
the other doors cannot be depressed
individually.
The tailgate can also be locked
independently of the master lock
system. Turn the main key clockwise
as far as it will go and withdraw. Every
time the driver's door is unlocked,
however, the tailgate lock will unlock
and can be locked again with the main
key if needed.
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
tailgate 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 Flap" (page 81).

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