Jenson Button admitted his first laps of Le Mans was a "disconcerting" experience.
Like former McLaren teammate Fernando Alonso, Button will make his debut at the famous race on June 16-17. Button is racing for SMP Racing and on Sunday completed 20 laps of the Circuit de la Sarthe, his first sampling of LMP1 machinery at the French venue.
"I was reasonably happy, but in the morning I found it another world -- driving around here in a car I don't really know," Button said. "I found it quite disconcerting. But we made some good changes over lunch, and I was much happier with the car in the afternoon.