Driving line-up Jan Charouz, Tomas Enge and Stefan Mucke took the spoils in the Lola Aston Martin, Mucke setting the best lap of a minute, 43.514 seconds.
Second in that afternoon session were Strakka Racing whose Ginetta Zytek was driven by Dany Watts and Nick Leventis.
Kolles Audi trio Narain Karthikeyan, Andy Meyrick and Charles Zwolsman were third after finishing fifth in a wetter first practice behind the other Kolles team of Christian Albers, Christian Bakkerud and Giorgio Mondini.
Driving the Speedy Team's number 13 Lolo Aston Martin were Andrea Belicchi, Marcel Fassler and Nicolas Prost.
Behind them in the morning were Pescarolo Sport (Jean-Christophe Boullion, Christophe Tinseau and Emmanuel Collard) and the afternoon-leading Aston Martin Racing line-up.