The Sauber team was powered by V10 Ilmor engines in a chassis named the C12 . This continued the Sauber 's naming policy from the sports car days . The team was to be powered by V10 Ilmor engines in a chassis dubbed the C12 , a continuation of Sauber 's naming policy from sports car construction ( the ` C ' was a reference to Peter Sauber 's wife Christine ) .