Perimeter clips are just a case of gentle levering on every car, once 1 is loose the others will be easier. The top is probably hooked on. I pulled a tailgate card from an older Jazz last week, but used the 'ripping off a plaster' method - no clips broken but it was in a scrapyard. Don't be too timid, they are quite tough although replacement clips are available on eBay if needed.
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TG