I have one of these which fits on a MINI fine, with a simple little trick - instead of hooking the top straps to the top of the tailgate (they slip off if you have a spoiler), feed them through and hook them on the bottom of the tailgate from the inside. The side straps can be fitted below the windscreen so no worries about breaking the glass. Just remember not to switch on the rear wiper as the top rubber stoppers do rest on the glass.