My panda twin air 2013 manual seems to say I have adjustable wiper timing on intermittent, but I seem to have just one fixed period of approx 5 secs intermittent. Is this correct? Not sure what my model is but it has pretty much everthing else inc' stuff I didn't even know, can't believe I've only 1 fixed wiper inter' speed. (oh yes, it doesn't have an outside temp gauge/sensor either)