Wear causes noise at vario roof seals on high mileage vehicles on Mercedes-Benz SL600

Problem Description and Possible Solution
On higher mileage vehicles, wear causes noise at the vario roof seals. Lubricating the seals can usually cure the problem; in most cases, the seals do not need replacement.
Problem Data
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Average mileage: 48,000 (48,000–48,000)
6 model years affected: 2004, 2005, 2006, 2007, more2008, 2009
7 people reported this problem
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Wind noise with top up.