Jenson Button drove the fastest lap in the first practice session for the German Grand Prix ahead of McLaren teammate Lewis Hamilton today.
Hamilton will be driving his 100th Formula One grand prix on Sunday.
With light rain hitting the circuit on and off, Button set the pace with a lap of 1 minute, 16.595 seconds, edging hamilton by .498 seconds.
Championship leader Fernando Alonso was third in a Ferrari, ahead of Michael Schumacher in a Mercedes.
A second practice session is scheduled for the afternoon.