Hi, I purchased an ex police Astra j sports tourer with parking sensors but, no switch. The noise is really annoying and without the switch, i can only deactivate it by going through the menu, and it reactivates itself anyway. It also prevents me from upgrading my stereo to an android unit as I won't be able to deactivate them at all then, I suspect.
I've seen I can purchase the switch on eBay, however I'm not sure if there is any extra wires I'd need to connect the switch to the car, I presume