Take a pick-iool and peel back the rubber at the edge of the molding next to the windshield glass. There should be a series of phillips-head screws that hold the molding in place.
Regards,
Randy D.

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W.R.Durrance
ASE Master Tech
Mercedes Tech 21 Years
68 250SE
68 SAAB 96 Ice Racer
69 300SEL 6.3
70 300SEL 3.5
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W.R.Durrance Engineering