Hi Marie, welcome to MercedesShop.
On your car, i believe this must be a 107 chassis as we call it, which was made from 1972 to 1989. This is a common complaint on these types of SL's, that's why I assume that's what you have.
The screws that you are tightening do little to fix this. There are other screws that will tighten this up, but they aren't as simple to get to. The inside rearview mirror needs to be removed, and the upper lights that are up under the header, on either side of the rearview mirror. Then you'll also notice a couple holes, one on each side, there are also phillips screws in there. Then the vinyl covers on each side can come off, down off that header panel above the windshield. At that point you will be able to see the screws that can be tightened to keep the sunvisors up.
Gilly
|