Hi Halls1030,
Do you have a sunroof?
My wife's 2015 S 85D does NOT have a sunroof.
Shawn
I DO have the full Pano roof with Sunroof, yes. The back panel of glass, (behind the crossbar) where I am now test mounting my iPass transponder is a fixed panel of glass without the blocking capabilities the front windshield has. I'll report back my findings.