Hi, can anyone post or do you know where to look for WIRING DIAGRAMS I.E WHERE IS THE REAR WINDOW DEFOGGER RELAY LOCATED on a 1975 240D ALSO WHAT ARE THE TWO BLACK 1 INCH BY 2 INCH FUSE BOXES ON DRIVERS SIDE FENDER THEY EACH HAVE 2 FUSES IN THEM AND UNDER THE FORWARD MOST ONE ON DRIVERS FENDER WALL THEIR IS A METAL RELAY that a black square plug terminal plugs into DOES ANY ONE KNOW WHAT THIS IS AND NOW ON THE PASSENGER SIDE FIREWALL THEIR IS ONE FUSE BOX WITH TWO FUSES IN THEM AND A METAL RELAY BOX WITH A BLACK SQUARE PLUG THAT PLUGS INTO IT WITH ABOUT 4 OR 5 ROUND TERMINALS ON IT ABOVE THE PLUG IN OVERNIGHT WARMER JUNCTION BOX ANY HELP WOULD BE GREATLY APPRECIATED AS MY DAUGHTER IS DOING MOST OF THE WORK IM COLORBLIND ...THANK YOU SO VERY MUCH SWASH 734-672-7517