I now have the rear camera installed; first conclusion: a really useful gimmick I have to reset a narrow driveway from the garage about 20m, on which often 4 small children (incl. neighbour children ) + friends jump around, Bobbycars or similar vehicle stand. Without camera the wg. the high edge of the board was usually an unsafe undertaking and depending on the day mood of the children only with instructor sure. With camera you have at least a chance to see and react. soon the reverse gear is inserted, the Navi-Schirm goes up; delay after inserting the gear approx. 5 sec. When the Navi is switched on, the picture jumps immediately. You can see 130° left/right and down to the end of the vehicle. A red line marks 30cm to the rear part, a yellow line marks 1,50m and 2m. Laterally, the line shows approx. 10cm above the width of the XC90 (incl. side mirror); where one would land at current handlebar impact. If one turns on the steering wheel, also d he lines and show whether and how to get into the parking space or how close to the edge stone. However, you should not forget to also look forward to see if the bonnet is hanging somewhere. With a delay of 15 sec the Navi-Schirm works again, which goes back to the Navi-mode, after you have left the reverse gear, or after a speed of 10 km/h forward. i.e. when pre- and rearrange the system usually remains active. Greeting, Michael