Hi, I wa lucky, I ordered the cheapest top from LA. I think it was ~$350 on sale 3 years ago. I had it is a box in the trunk and was driving the car around our circle, fresj out of a 3 year garaged rest, when my Stuttgart German neighbor Gisela was on a walk with her visiting brother stopped me. He is a MB restorer / upholstery guy who speakes just enough English. She told me he was coming but that he 'worked on Mercedes' i thought he was a mechanic. In a febal atempt to communicate I got out, opened the truck and broke out the new top. He just starred at me and finally started to say "I'm on vacation, but if you have a few cases of good beer, I'll watch you put it on."
It is a little tricky in lining up the ribs. getting the front bead tight against the front lip and most of all the back rim takes extra car to tuck under the frame and some guessing as to how tight to make the gable.
I had my top replace 3 times over 30 years. My job was the best. The shops were in Silicon Valley, Sunnyvale and Mt. View. Shops that had plenty of opportunity to replace sl tops, but each time, each shop screwed something that I was far from perfect. The worst, the front lip was so far from the window frame that it whistled at 50mph. I had to unscrew, unglue and eliminate the gap. I was afraid to take it back. If they couldn't do it the first time, why waist more time teaching them how to do it? I just get tired of paying good money for ordinary work on an exceptional car.