Wiedersehen is wrong. It's Aufwiedersehen.
I don't see how on earth I'm Ok is german? WTH?
How about Guten Tag?
More:
Bahn - Train
Auto - Car (Pronounced Ow-toe)
Fernsehen - Television
Blöd - Stupid
Schluss - Lock
Flugzeug - Aeroplane
Treppe - Staircase
Frau - Ms/Mrs/Miss (Smith or whatever)
Herr - Mr (Smith)
Junge - Boy
Mädchen - Girl
Essen - Food/Eating
Spiel - Play
Straβe - Street
Buch - Book