today i checked out an 93 sc400 with 140k clean title. asking 6500. only problem's climate control display bottom part turned black. cd changer skips a little. and a little small cut on the driver door panel. engine a little clicking sound think it might be injector. or valves and think maybe rear diff. oil need to be changed becasue when shifting into drive mays a small click sound. but car drives very smooth. should i keep look or just go for it????