We just purchased a nearly new 2005 2619 from a non-TM dealer. Everything seems to work, but neither the dealer nor I new what the small antenna-looking thing with the red LED was on the roof. I have attached a picture.
You are looking a an amplified am/fm antenna for your am/fm radio if you have one and if you don't have one you will have an antenna all ready when you get one.
Bill
If that antennae should fall off abd dangle by the wire, you can restick it with two-sided tape (heavy duty) and it will stay in place. Ours did and we did! Queeniereads aka Judi
Does the radio antenna always stay on (red light on top) and if so, can it be turned off somehow? I would think it always has a small drain on the battery.