Cannot Access system settings

Hi, I have just bought a 2010 Renault Megane Mk3 with built in tomtom navigation. Unfortunately the SD card was not with the car and when i asked the dealer he told me that there was no SD card.

No i am trying to access the system settings in order to switch off the Tomtom navigation and also to set the clock but cannot access these settings.

I am selecting the set button in a long press but all i am getting on the screen is NO MAPS FOUND.

Any suggestions please ?

thanks

Cannot Access system settings