What's Antenne GPS Has I need?

Hi,
I've buy Navis Comand w169 new model (With SD and Hardisk), What's antenne GPS Has I need?
Thank
Best Regards!

Moin,Moin,

GPS mit FAKRA Anschluss z.B.

http://cgi.ebay.de/GPS-Antenne-FAKRA-Mercedes-Comand-APS-50-VW-MFD2_W0QQitemZ310103925131QQcmdZViewItemQQptZFahrzeugantennen_Zubeh%C3%B6r?hash=item310103925131&_trksid=p3286.c0.m14&_trkparms=72%3A1229|66%3A2|65%3A12|39%3A1|240%3A1318