Mercedes-Benz 420 SEL 1986 Owner's Manual page 38

If the seat belt is not buckled
within 30 seconds, the seat belt
extender will return to its rest
position.
This is also the case if the key is
turned to steering lock position 1
or 0 or if the door is opened.
Emergency operation:
If the electrical system fails, the ex­
tender arm and belt can be manually
pushed back into their rest position.
• The belt must be pulled snug and
checked for snugness immediately
after engaging it and during driv­
ing. If necessary, tighten the lap
portion to a snug fit by pulling
shoulder portion up.
On the coupe, the swivel fitting
(mounted on the lower anchoring
point to facilitate entering the vehi­
cle) must point forward.
36
Unfastening:
• Push in the red button (3) in the
belt buckle.
• The retractor should completely re­
wind the belt and latch plate (1).
Operation:
The inertia reel stops the belt from
unwinding during sudden vehicle
stops or when quickly pulling on the
belt.
The emergency tensioning retractor
tightens the seat belt upon severe
frontal impacts within the shaded area
shown on page 37.
The locking function of the reel may
be checked by quickly pulling out the
belt.
Lap belt for middle of rear seat:
Pull belt with latch plate (1) across the
lap, press latch plate into buckle (2)
until it clicks. The belt must not be
twisted and must be tight.
To shorten the belt: With the latch
plate engaged, pull the loose end of
the belt.
To lengthen the belt: With the belt un­
fastened, turn the latch plate so that it
is a little more than 90° to the belt,
then extend the belt. Fasten the belt
and shorten as stated above.
To disengage the belt, push red
button (3) in buckle.
If the center seat is not occupied, the
belt buckle and rolled-up seat belt
can be stored in the space next to the
rear arm rest (to the left or right of arm
rest).