It turns out the cabriolet top won't work unless the rollbar is in the fully retracted position. I was using the rollbar and the fuse blew just before it was fully seated. It looked fully down to me - hence the confusion. Phew!

http://www.peachparts.com/shopforum/tech-help/196318-please-identify-fuse-post1589110.html?posted=1#post1589110

__________________
95 E320 Cabriolet, 169K