One of the good things about a modern car is the way it adapts automatically to climate changes. Come rain, snow, ice, or a scorching day in summer, cars cope with changes in temperature and environment. But although much of the time seasonal changes bring no problems, some checks are advisable as winter ends and spring turns to summer. Read more
If the filter lid is marked for summer and winter this means that you have to rotate it - a mask attached to the underside of the lid blocks off certain inlets depending on its position. Undo the nuts holding the lid down, reposition and secure it again.