Seat Belt Extender - Cut-Off Switch

84mercedes03

TO: OUR MERCEDES-BENZ PASSENGER CAR DEALERS


DATE: October, 1984 REF. NO. MBNA 82/14, 91/3

SUBJECT: SEAT BELT EXTENDER SWITCH MODEL 380/500 SEC


A switch can be installed in the above-mentioned models to give customers an option to manually deactivate the seat belt extender. The switch with the pertinent wiring harness can be installed in either side panel adjacent to the rear seat, to affect the driver's or the passenger's belt extender. The attached Work Instructions, No. 158, provide the necessary information to fabricate and install the necessary harness(es). It should be noted that two harnesses are required if it is desired to modify both driver's and passenger's side of the car.

Please emphasize to your customer that this shut-off feature for the seat belt extender does not affect the level of safety provided by the seat belt when worn.
Subject SEAT BELT EXTENDER SWITCH No. 158
MODEL 380/500SEC
Date October, 1984


File Ref. 82
Group

FIGURE 1:

1. Assemble a wiring harness according to Figure 1.

2. Disconnect battery.

3. Remove rear seat side panel(s) (disconnect window rocker switch with harness from panel [Body Assembly jobs II, job no. 91-508]) and unplug 12-pin connector from the belt extender's control unit.



Wiring Layout

FIGURE 1:

4. Pull out no. 4 pin socket (with brown/yellow wire) from 12-pin connector and unsolder from wire. Insert pin socket ((a), Figure 1) of self-made wiring harness into position no. 4 of 12-pin connector.

FIGURE 2:

5. Solder the female part (1) of the single-pin connector to the previously unsoldered brown/yellow wire and connect to the male part (b) on the self-made harness (Figure 2).

NOTE: Use electrical tape to hold the single-pin connector to the major wiring harness (as shown).

FIGURE 3:

6. Cover the area where the switch is to be installed with masking tape and outline the switch location according to Figure 3 (also see Figure 4). Cut out a rectangular opening for the switch.

Dimensions a = 78 mm b = 23 mm c = 22 mm d = 45.5 mm
7. Install switch with flange into cutout and plug in the wire harness connector.

8. Check function of switch and install side panel(s).

FIGURE 4:

Reference locations for belt extender switches (arrows).



Parts Information (for modifying one belt extender)
Time Allowance

91-0970 01 Switch, Seat Belt Extender System 1.6 hours Subsequent installation