See also:

Ruts and gravel roads
Observe the following rules when driving along ruts in off-road terrain or on roads with loose gravel: Check that the ruts are not too deep and that your vehicle has sufficient clearance. ...

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

"Minispare" emergency spare wheel
The "Minispare" emergency spare wheel can be found in the stowage well under the trunk floor.   Lift the trunk floor up.   Remove tool kit tray 1.   Turn stowage well ...