I find that the my drivers side leather seat is really showing wear. Especially the left side of the seat where you get in and out. The passenger and rear seats are never used and they look brand new, is there anything I can to to help firm up and undo some of the wear?

I always use BMW Leather conditioner and cleaner on all the seats once every 3 mouths. Also the X5 is always garaged and never outside for more than 8-10 minutes.