I have an "off" button under my steering wheel below my parking sensor and econ buttons but higher than my petrol cap opener. It just says off and it has a symbol of a car on it and what looks like the antenna or airwaves coming out of the roof of the picture. Any ideas? i have searched my manual but cannot see it. Here's hoping! AMM
I know you mention that the "waves" appeared to be coming from the roof in the picture but given everything else you describe about it (including location) I wonder whether it's actually this:
If so then that's the Vehicle Stability Assist (VSA) Off button - pressing that disables the stability control on the car until the car is turned off.