Nico Rosberg took his car to the garage after just 15 laps.
A risky pass helped Brendan Gaughan steal the win in the closing laps at Kentucky Speedway.
Nearly a dozen cars lost control in the wet conditions. frontrunners
Alex Brundle ended up victorious in this battle to be the best of the rest.
100 minutes of rain led to chaos.
Audi took lead of the standings with second victory of the season
Delayed eliminations ran Saturday at Texas Motorplex.
Two-car team makes overseas debut in November.
Qualifying at Singapore was exciting for everyone.
Esteban Gutiérrez: "We made the best out of what we currently have."
Pastor Maldonado qualified in eighteenth and Romain Grosjean sixteenth for tomorrow’s Singapore Grand Prix.
The team have been working overnight to improve the performance of the Williams Mercedes FW36.