kwadeuk

Hi there people,
I have recently bought a 55 reg 525d M Sport with Pro sat nav (on 19-05-11) however the sat nav display started playing up about a week ago with messages like 'Please insert dvd in drive' and 'disc read error'. I bought a new updated disc thinking it maybe the disc but to no avail, same thing is happening.
Any advice on diagnostics or is the player goosed?
By the way I got 3 months warranty with the car - but hey I read the 'not included in policy' section and what do you know - sat nav not included!!

Cheers,
Alex Rogerson