Hello on the other hand, since I did not find any instructions for this, I wanted to report quickly my experiences regarding display changes in a RNS 315. Of course, this is also true for similar devices (Skoda Amundsen) and probably also for very similar devices like the RNS 510. In advance: The naked display can be supplied as a spare part in China or Germany and mostly under the product number L5F30872P02. I got it over the bay from a dealer (in this case Tuncer in Augsburg) for 119 euros including taxes and shipping. It was identically glued like the original installed specimen, so that I assume that it comes from the same production line. The installation is really not difficult and can be done by anyone who has no two left hands. In case of display breakage or heavy scratches (as with me) this is a convenient way to repair the RNS 315. What you need to get back from the best minutes.