Hi, I have ds7 crossback the side lights and tail lights are on while driving Light switch is in auto position and not side light position. Can not switch them off.
I believe that they/DRL are required to be on when car is moving so cannot be turned off (vehicles after 2011 ?)
I had Citroën C5 from 2009 which had DRL but they COULD be switched at “0” position but came on at “Auto” and went to headlights at low ambient light.
My ‘old’ DS7 from 2018 had DRL / sidelights and they were always on (including rear light)