@3d - I think that may be the issue - i.e. if its not reproducable they probably won't try to. However its a lease (employer supplied) car so if nothing else fails we get them to take it back.
@toc - thats the same in most cars nowadays - I think the old fashioned cable in my Aygo is still just connected to the ECU.
In a key operated car of course you can turn the key. What do I do if the Prius ignores the off button ? I know - hold it in for 6 seconds - works in PCs