See also:

Load index
In addition to the load bearing index, the load index may also be imprinted on the sidewall of the tire. This specifies the load bearing capacity more precisely. ...

Driving with summer tires
Observe the notes in the "Winter operation" section. ...

Windows fogged up on the outside
Switch on the windshield wipers. Activate automatic climate control. You should only select this setting until the windshield is clear again. ...