OK, I summary the results:
Audi A3- great quality,but without driving pleasure 2.0 FSI Combinated 7,4 L/100 km, City 10,1 L /100 km,
engine not very cultivated, Bag:370 L. Weight : 1315kg
Mercedes A 200- Great step forward,Better handling than previsious A class,
More space then A3 and 120i, 7,2 L/100 km,Bag:435 L !!!, Weight: 1270 kg
BMW 120i- great combination between handling and engine,bad small space inside,
And less comfort, 7,2 L/100 km, Bag: 330 L,Weight: 1335 kg
Best Engine: Of course bmw,then merc,then A3
Best Space: A class,A3,1 series
Price: A class,120i,then A3
Handling: BMW 120,A class,A3
Concret version in Test Audi A3 Sportback 2.0 FSI S Line
BMW 120i SE
Mercedes A200 Avantgarde
winner was Mercedes A