| Well....Good news. The Dealer found the culprit. Indeed, the Left vario roof (open/close) hydraulic cylinder showed evidence of leaking. It seems that the piston appeared rusty and the seal was cracked. Using a dental mirror, after exposing this piston in its awkward position, they were able to see the leakage. However, there is no puddle beneath it so somehow the minute amounts of hydraulic fluid somehow escaped this area.
How did this happen? Don't know. This car, though sat unused for quite a long time. I bought it with less than 8000 miles on it last year, and the previous owner had 10 cars in a thermostatically-controlled garage. I'll never know how it happened, but at least I will have a good summer without fear of the top freezing in half-opened position.
Thanks for all your suggestions and help.
Stan |