Gee... that's really great.
You can find it listed as G-Class very nicely at
www.mercedes.com - enjoy.
/sarcasm off
If you really WANT to get specific, it's called the G-Klasse in Germany.
EDIT - If you want, I'm sure you can find that at
www.mercedes.com too. If you feel so obligated to look. I can't read German.