Volgens de handleiding (Opel Mokka Manual.PDF, pagina 29) bevindt zich achter / naast de spiegel weldegelijk een gebied waar geen coating is aangebracht:
Windows
Windscreen
Heat-reflecting windscreen
The heat-reflecting windscreen has a
coating which reflects solar radiation.
Also data signals, e.g. from toll
stations, might be reflected.
The marked areas of the windscreen
behind the interior mirror are not
covered with the coating. Devices for
electronic data recording and fee
payment must be attached in these
areas. Otherwise data recording
malfunctions may occur.