New beeping problem

I've a new beeping prob for all to help decipher.

I get 4 slow beeps after the car has been started (in ready mode). Never happened before. Seems to happen everytime I start now. It doesn't seem to be the seat belt alert (turned those off at 5,000 miles), not the reverse beeps as these 4 slow beeps will happen while sitting there OR after putting it into D or R. Any ideas?

No error lights, idiot bulbs or performance issues. Touchscreen normal, radio normal. Not sure what to make of it. Would it be worth it to take to dealer now or wait for a few start cycles...

 

okay, I'll try that scenario (SO has the car right now). It seems I've changed nothing in my routine and these extra 4 beeps happen well after buckling up!

I usually start the car with foot on the brake, then reach for seatbelt and buckle up, then lock doors, then shift to R (backing out driveway) or shift to D if reverse isn't required...

hmmm...have I just not noticed the 4 beeps until now (26,000 miles later)!? This car is so cool, it could just be messing with me.

 

As far as the trunk/doors not being closed...should there be a door ajar light on the dash as well? All openings are closed, had my SO double check that earlier today. But the extra beeps did start with me driving yesterday after a long (7 hour) trip. Then it happened again after the car sat a half hour, when I moved it to the garage. Strange.

 

Well, it seems it may be the factory add-on 6-disc changer (below radio in cubby). Lights that indicate each disc (green if the slot is filled, orange for the one that is "cued" ready to play) were blinking on and off in unison upon starting the car.

Usually the CD changer lights only blink when changing a disc to play or loading. Pressing the disc button on the radio would not allow the changer to be selected, only the single play CD would play. Hmmm...I've ejected discs one and two with no extra 4 beeps this time when starting the car. Disc 3 plays normally. I'll try other discs tomorrow, maybe this is all it is!?? Bad disc(s) or possibly a changer malfunction. Any ideas whether the radio gives ya beeps if it's in distress?