After 1 too many antenna losses on my wife's 93 240 wagon, I started looking for a better alternative, and found it at the bone yard. I bought an antenna from a 91 Honda Accord, and with just a little finessing it fits perfectly in the origional location. You can drill two small holes and use the screws that come with the Honda, or do as I did and just use a bit of silicone. It is retractable(a big plus at the auto car washes), its black finish matches the black trim on the car perfectly, even the angle it extends at mirrors that of the rear hatch. I also own a 89 740 SW and see no reason it wouldn't work to replace the very costly power unit on that vehicle.