My wife has an '87 240DL Sedan. The two piece hubcaps (with clips) on this car fall off each time the tires are rotated. My '90 DL has the one-piece hubcaps which seem more secure. Are these two types of hubcaps interchangeable? Is the bolt pattern and rim the same on the 87 versus 90 models, despite a different hubcap design? Thanks for any suggestions here.