My 2003 & 2009 V70s ran with headlights on all the time. My 2015 V60 has an "auto on" function that turns on the lights at dusk (I'm fine with this since changing bulbs - and the 2003 had a real appetite for them - was a PITA) but some states, mine included, require the use of headlights when it is raining. Is there a function that will tie the auto-on system to the wipers or do I need to manually turn them on (and off) when it rains?