I'm about to pick up an 83 300SD from someone I know. It has 232K on it. He bought it from his neighbor 2 years ago at 210K. It doesn't have any rust but in usual gray anthracite fashion, the roof,hood & trunk can use a respray. Last summer, he was going to re-do the seats but ran across a gray back seat from a later model, complete with head rests in great shape so he installed it. When it came to the front, instead of recovering them, he found black front seats in great shape and installed those. My plan is to try re-dyeing the rear seat, package shelf and maybe the door fabric inserts black. Anyone do this with success ? Any recommended products or should I try an unholstery shop ? Will they redye or just paint the seat ?