You will find you need several things to install forward fog lights on your 740. If the wiring is actually in place, you will need the switch, relay, spoiler with cutouts on the far ends (preferably unpainted), a pair of mounting brakets, and of course the lights themselves... Again this assumes the wiring is all in place and ready to go.

Most of these parts should be available from most of the bannered advertisers, as well as eBay. I would HIGHLY reccomend finding a buddy in your area with a 760 made *BEFORE* 1988 who will let you experience their fog lights before you make the plunge. As the proud owner of both a 740 and 760, I don't find the foglights as usefull as they could be. My front end is very different from yours, by the way, so I cannot sell you my fogs. Sorry. :)
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89 764 GLE 150k/ 86 745 GLE 240k