Can I pop the glass off the anolog clock without damaging it. on 2006 Mercedes-Benz S500

Have imported it from another country and the comand controls the clock by GPS. So would like to adjust the clock to my time zone. I can't use the Navi.

Asked by for the 2006 Mercedes-Benz S500
BS! You mean to tell me that the GPS dont know where it is at? Got to be a way to change the clock, one way is unhook the battery until it's TIME to reconnect it! Figure it out.
Thanks very much. Will taking off the battery upset my settings etc ? Appreciate your help.