yes mine is heated & auto dim or electrochromatic as they like to call it, mine started as a small crack on the window side of the mirror, followed by the mirror gaining what looks like a brown tint but now the crack is spreading daily. i was lucky and did an ebay search for bmw x5 auto dim mirror, and found a used one for £57, best price i found was for a convex electrochromatic mirror crd000260 which is a pattern part from LR direct for £137 plus vat. i don't have the bmw part number as it isn't on the one i bought, but i'd guess bmw mirror glass will be a similar cost (euro car parts are quoting way over £250). its a bit of a gamble, but a lot of the replacement mirrors on ebay are quoting they fit the RR & e53 x5.