I don't know about a 1985 model, but I had a 1977 that turned me off to GM for the last 25 years! I bought it used in about 1981 and only kept it a year. The first thing that ticked me off was the way the oil filter was situated. They had to shrink it to half normal size to fit between the block and frame. My engine was a 301ci, so that may have been the problem there.
The components used in it seemed cheap too. Small things like the electrical connectors etc.. The heater blower died, and when I saw how chintzy it was I wasn't surprised. One electric window motor went due to poor clutch design. The thing that caused me to bail altogether was the drone that came from the rear end. No big cruiser like that should have had such a poor sounding ride. I had a mechanic replace the inner bearings, but that didn't fix it. When he had it apart, he said the ring gear and pinion looked small enough to have come from a Pinto! After putting the rear end back together, it still droned. The A/C didn't work well and a few other things just caused me to trade it in on a used '78 Mercury Grand Marquis. Been in love with those ever since!
The newer Parisians may be a whole lot better, but I never took the chance to find out. The 305 is certainly better than a 301.
Edit: BTW, mine was called a Bonneville and it had all the bells and whistles. I believe it was known as the Parisienne in Canada.