I have a 2007 GS350 w/Nav and ML.I have the SAT button on the stereo so I know it's satellite radio ready. I found the OEM XM kit at Sewell but I would really prefer the OEM Sirius since I already have 3 Sirius accounts and adding another only costs $7 a month as opposed to $17 a month with XM and Best Of Sirius(I need to have Howard Stern). I can't find the Sirius OEM tuner that mounts in the trunk anywhere. Does anyone know if I will be able to find one or am I out of luck? I found plenty of aftermarket Sirius kits on EBay but they all mount behind the Nav and that's not what I prefer.