[Bear]

My guess is the rubber bushings on the sway bar, on my car (not a MERCURY) I have to lube the bushings with silicone every once in awhile. If you can loosen the bushing retainer and then slide the rubber bushing to one side, you can clean the area where the bushing resides and then lube with a silicone grease and slide the bushing back and tighten things down