I have the HD radio option on my '06 650 coupe. I recently got a $150.00 HD tuner for my home stereo and discovered that many HD FM stations transmit multiple programs, so called "multicast". Why is it that this $600.00 BMW option (maybe even more? I don't recall) apparently DOES NOT SUPPORT Multicast. Did BMW miss this option? Only available in newer cars? Is there a SW oupgrade to add Multicast?

By the way, several AM stations also transmit in HD. Gives a BIG improvement in sound quality and noise reduction. Actually a much bigger improvement than HD for FM.