In the settings the demo mode button is always greyed out and it says off in grey.... Does this mean it's off ??? Is it normal that the square button is always grey and can't toggle on/off ??? It was like this also before I upgraded the HDD , is the unit damaged ? Thanx in advance!

Your Demo mode is off. You must set a route before you can change the selection to turn demo mode on.

Using the Demonstration Guidance

This is a demonstration function for shops. After a route is set, the simulation of the route guidance to a destination is automatically displayed. Normally, set this to [Off].

1. Set a route.

2. Touch [settings] in the navigation menu.

3. Touch [Demo Mode] to change the setting. Each time you touch the key changes that setting.

[On]: Repeat demo drive.

[Off] (default): Demo Mode is set off.

Thanx so much for the fast response ! I will set a route to see if the demo mode feature is then accessible, I will post back if the problem persists.