Mercedes-Benz 300SD 1981 Owner's Manual page 23

Operation:
The safety belt inertia reel stops the
belt from unwinding further in case of
vehicle deceleration in any direction
of if the belt is pulled out quickly.
Functional test:
The locking function of the inertia reel
can be tested by braking, driving
around a bend or by pulling the belt
out quickly.
Lap Belt in Rear Passenger Compart­
ment:
Pull belt with latch plate (1) across the
lap, press tongue in lock (2) and allow
to engage audibly. The belt must not
be twisted but must be tight.
To shorten the belt, pull belt end with
the latch plate engaged. To lengthen
the belt, turn the latch plate so that it
is at a little more than 90° to the belt
and pull before fastening the belt.
To disengage the belt, push red
button (3) in the lock.
Note:
No safety belt can be used for more
than one person. Belts are not
intended for children.
After an accident, inspect the safety
belts and replace them, if required.
The belt anchors in the vehicle should
also be checked.
Belt webbing must not be routed via
sharp edges.
No modifications which may affect the
efficiency of the belts must be made.
For cleaning and care of belt web­
bing, refer to page 59.
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