Hello together, I always read questions about the subsequent installation of a rear-view camera at various points, without however a concrete answer and experience. Since Mercedes excludes this possibility and refers to the fact that my vehicle 1. does not have a video tool and 2. no “cable tree” is available, seems to have already given the answer(??). Have the Navi with the large color display and think that it should be possible, this display e.g. with a mini-radio-Ka I think Mercedes is always putting this topic aside quite quickly without really trying to do so. Would be really happy to find people with creative ideas here… Thank you and pre-Christmas greetings from Switzerland