Ah, possibly not. I also - some years back - ended up in a rental Vauxhall with the same situation. I eventually discovered that the solution was to flick the *same* way to turn it off. However, as it also had the three-flashes trick it took a while to hold it long enough to trigger the 'on' as opposed to the 3-flash, with further off-pushes actually turning it on again.
As I recall, the wipers did something similar: a single push for intermittent, second push for on third for fast - can't recall how that turned off, but I recall it was much more sensible a year later.