Well, if your visors are anything like mine (and I assume they are exactly like mine!) they actually fit up into a recessed 'pocket' in the windshield/roof upholstry. If you attempt to install a longer visor, it simply would not fit.

I actually bought a nice set of palomino visors from a guy right here on this forum and they apparently were taken off another vehicle other than a w123! After installing them, they did not fit up into the recess. He is looking for another pair for me!

I do hope this helps you...

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Dale