Thanks to everybody for their help, especially, Anthony. Simple operation if you know where to look. Although using the mirror and needlenose pliers kind of felt like Anne Oakly, (whoops, showing my age) it's a little tricky. Plus the part about "looking through the windshield" kind of like, you can see it, but you can't touch it. Gordon's description was perfect, as I craned my neck, squashed up against the inside of the windshield and rolled one eye out of socket to try to spot the bugger. Finally, it's out and a new one to be found tomorrow. Thanks again guys, it was fun!
Jr '89 535iA (soon with lit thumbwheel, but still groping)