My judgement is based on following grounds:

Seldom we see a car with so many new and innovative ideas as the little IQ. Toyota has shown that it is possible to build a car smaller than three meters, but roomy, comfortable and safe enough to replace a bigger car. It is a dream to drive in city traffic but also a nice companion on countryside roads.
The IQ will certainly be a guiding star for a growing mini-class of cars.

The Polo is another proof that we do not have to give up comfort and safety to drive a small and environmentally friendly car. It has an impressive quality feeling and some very good and clean engines. I think it is the best car ever in the small class.

Striking on the outside, smart on the inside – I can not resist Skoda Yety. With its effective 4WD-system it is very suitable for Swedish circumstances.

Unfortunately the points are not sufficient to reward the four last cars as much as I should want to: Citroën C3 Picasso for its very practical and roomy interior, Mercedes E-class for its outstanding (but expensive)  safety and refinement, Opel Astra for its style, cosy interior and inspiring driving characteristics and Peugeot 3008 for its design, flexibility and comfort.