I've had my E300D for almost a year now and had never tried the "WB". Holy crap that's cool. This has to be such an easy thing for any manufacturer to put in. Granted, not a oft-sought feature, but if you needed it, you'd be thankful they put it in there.

Make me want to keep my stock radio. If I could only find my stash of tapes...

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'85 300TD "Puff The Magic Wagon" - Rolling Resto
'19 Mazda CX-9 Signature - Wife's sled
'21 Morgan 3-Wheeler P101 Edition
'95 E300d - SOLD
'84 300TD "Brown Betty" - Miss this one
'81 240D "China Baby" - Farm grocery getter