hello forum! have decided after a long time now for a portable navi http://www.garmin.de/index.php?content=Product descriptions/Quest.php by the metallised disks I also have to buy the antenna with it, e.g. the one: http://garmin.de/Show-Zubehör.php?znr[1]=500043 but would prefer to use an original of saab. how can you tell if the installed shark fin on the 9-5 combi is only suitable for GSM, or also as a naval antenna? my 9-5 (20) 019 didn’t have a navi as standard, but could the antenna possibly still be navi-suitable? what can an original saab GSm-GPS antenna cost and what are there for GPS plugs down there? who knows what. please thank you for info