Do these sales guys know ANYTHING?
One tells me that you cannot easily or reasonably add SIRIUS to a non factory equipped car...another says you can if the car has NAV....
Do any of you guys KNOW what is the real deal?

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BMWCCA # 12660
14 GLK 350 M/B (hatefull POS gone)
05 CLK 500 AMG Cabrio
07 530xiT
09 Boxster