I have a 2013 MS 60 (pre-AP), and I'm pretty sure it's done this as long as I've owned it. After starting up, the first time the car hits 25mph, there is a subtle single "beep" sound. It's easiest to hear with the radio off & HVAC off. It doesn't seem to come through the speakers but maybe comes from the MCU itself? Rear-seat passengers can't hear it, which has led my kids to believing I've made it up... but it is undoubtedly real, just subtle/quiet.
I can't be the only person who's noticed this. No idea which models exhibit this behavior but it can't be only mine, right??
I can't be the only person who's noticed this. No idea which models exhibit this behavior but it can't be only mine, right??