He could n't use his new specification engine at Monza and the old one died while he was holding third place .
Unfortunately for Rosberg it was also around this time of year that Mercedes ' reliability took a turn for the worse .
Rosberg could n't use Rosberg 's new specification engine at Monza and the old one died while he was holding third place .
Unfortunately for Rosberg it was also around this time of year that Mercedes ' reliability took a turn for the worse .