With the 2002 seven series, anything is possible. When you hear the chimes, is your radio on or off (not that I know anything about the 2002, because I do not), but it might jog something in someone else's memory who also owns a 2002 or later car. My 2001 chimes at me on the hour only because I have it set in memory and also at 37 degrees.
Here's a suggestion: There are several other forums out there where you might get some advice. One in particular: dub dub dub dot bimmerfest dot com has a lot of folks with 2002 and younger cars, and www. bimmerforums.com has a lot of folks with 2001 and earlier cars (pre-Bangle Butt as we say). Ask your question up there and see what hits you get.
Last edited by crewdog_843; 03-20-2008 at 12:44 AM.