Antenna's that are enbedded in the windshield don't work very well on the AM band. The Rod type antenna are the best. But of course they spoil the looks of the XLR. All I have to do is step into my Wife Eldorado to hear the differents (has a Rod type Antenna) However the performance of the STS enbedded Antenna is better than that of the XLR. Have pointed this out to my Dealer. Have heard nothing back.