If the roof strips are removed, you may experience "oil-canning" of that large nearly flat rear roof. I had it pretty bad on my 1980 300 TD until I added some mahogany ones of my own, applied with 3M 5200 (Don't use this on anything you might want to remove !). The dental floss sounds like a good idea; I'll remember that. Hitting bumps even at low speed, or just driving over about 50 MPH caused the roof to flex and make a booming or rumbling noise, very noticeable. Steve