Mercedes were not slower. Speed trap is at the top of Eau Rouge. RBR were very fast through there and Mercedes very poor. S1 detection is at the end of the Kemmel straight and the speeds of the cars through there are available: HAM – 316,9; VET – 314,2. Was DRS activated at the time? Most likely. Fastest through there is Sutil with 322,2; Alonso managed 320,3.