Can't find any info on this anywhere - I think it might be a new extra? My brochure lists a "Back Rear Bumper Protection Plate" - it's also available in carbon as part of the carbon pro pack.
I think it might be wise to spec it as I lift a large case in my boot every other day and my current BMW has been scratched up a fair bit.
Anyone got any pics or experience of one? If it ruins the look I will try tape instead.