The Delta radio in my '96 A6 is acting flaky - intermittent cutting out, strange displays, etc - so I'm thinking about buying a replacement on eBay. My question is this: how do I tell if the radio being offered on eBay is a Bose unit or not? The part numbers being advertised by two differenet listers for a Delta radio are CC 400 035 192A and CC400 035 192B. Is it possoble to tell whether eiter (or both) of these are Bose? TIA. -Chip