to check fluid level raise the top and remove rear seat cushion put some rags below the filler plug remove plug fluid level should be level with bottom edge of hole do not operate top with plug...
Mechanic that once worked at VW dealer told me it was hydraulic fluid, better know as power steering fluid. He recommended buying from the dealer to keep the same quality when adding to the reservoir.
Thanks for the info. My top doesn't always go down, but of course today when I took it to the dealership it worked. Where do I find the conv. motor? (I've only had the car a couple of months.) 98'...