My M4 in production also has Silverstone full leather interior, and it’ll get CarPro ceramic leather coating at the first opportunity. I’ve used it on Merino leather on my X5, in combination with Leather Masters leather dye transfer cleaner. The leather has remained supple after 41,000 miles, plus easy to clean (restores the original matte finish on high-traffic areas which gradually turn shiny).
This time around I might apply ceramic to the carpet in the front floorwells, which are subject to road salt residue. Rubber floor liners do a great job of protecting most areas, except around the throttle pedal and the dead pedal.
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