trade it in and run like hell, i used my 1987 740 as a back up car when my 96 850 was in the shop, ive put well over 2 grand into it in the last 4 months, motor runs like a top, its other stuff like pnp switch heater fan, my 740 had almost 300 k on it when i sold it for 400 dollars and the ac still worked. I have a different opinion of the 850. too much nickle and dime stuff. so run run run, kelly