The recent AutoBild Article mentions some data - claimed to be official (but provisional):
141 KW:
10,9 l/100 km
0..100 km/h: 7,8 s
Top-speed: 230 km/h

176 kW:
11,4 l/100 km
0..100 km/h: 6,5 s
Top-Speed: 240 km/h