The championship leader posted the quickest time late on in a rain-affected session at Silverstone this afternoon.
Speaking at a press conference after qualifying, the German said: "It was definitely quite crazy, certainly in first qualifying it was and last qualifying also.
"The tyres were still drying out so we lost time on the out lap. We sat in the garage and eventually came to the conclusion that we might as well go out out and have a look.
"Then it seemed like it was worth it because the last part of the lap was very dry. It was a great team effort."