My X5 has the factory fitted rear-seat entertainment system (screen mounted to rear of front armrest and DVD player mounted below) and I'm having an issue with the DVD player. It does not read DVDs .For some chines dvd it says medium read but noting on the screen. I have not used the dvd player so far. It is 2008 BMW X5. My local BMW dealer are being their usual arrogant selves and will not offer any decent level of service what so ever by way of at least trying to offer some advice! Does anybod know how to fix this.