try the following site

xdrivers.co.uk • BMW X owners forum and discussion

I am sure somebody on there has had a similar problem, it was a matter of taking it apart and cleaning some contacts. You will need to join and put it up as a problem as the info on the old site and has been lost.

I thought that the X5 16:9 screen had a slightly different viewing angle than the 5 and 7 series, (not sure).

Phill