When I start my car, it dials my mobile number (or is checking voicemail?)

[Warhammer486]

I have this issue sporadically in two separate vehicles, a Volkswagen and a Subaru. When I start my car and it connects via Bluetooth, it will dial my number. I've had the Subaru for a few months, and this just started the other day. I had the same issue pop up with my Volkswagen in the past as well.

 

[B. Diddy]

When it dials, does it go to your voicemail option? Could it be that you're accidentally pressing a Call button on the car, like on the steering wheel?