Re: Bit puzzled about touchscreen speedlimiter.
You can set it from a physical switch on the steering wheel, but there's also a "MEM" feature which brings up a list of common speeds (and it is a nice touch you can set them yourself) on the touchscreen for selection.
As I say, you press, it "blips" and then does nothing. (I realise the debouncing is a little too heavy, but it makes the system useless - you can't trust it)