Rosberg posted a fastest lap time of 1:15.614 to beat Hamilton by almost four-tenths of a second on the super-soft tire, sending out a firm warning to his title rival ahead of qualifying on Saturday.
Hamilton had a scare after coming across Daniel Ricciardo while exiting the pits late on, but escaped unscathed, although not without telling his team and FIA race director Charlie Whiting over the radio that he felt the Red Bull driver had got too close for comfort.
Sebastian Vettel finished as the best of the rest once again for Ferrari, reducing the one second gap to Rosberg from P1 down to just six-tenths of a second.
Max Verstappen followed in P4 for Red Bull ahead of Ricciardo and Kimi Raikkonen in the second Ferrari. Nico Hulkenberg survived an early run over the curb at Turn 1 that sent him airborne to finish seventh ahead of McLaren’s Jenson Button and Force India teammate Sergio Perez. Fernando Alonso rounded out the top 10 in the second McLaren.
Button’s session came to an early end after he reported an “irritation” while in the car, resulting in a visit to the medical centre for a check-up.
The session also saw a clamp down on track limits at Turn 1 after race control reported 93 incidents of running wide in FP1, prompting a resumption of the three-strike system seen in Hungary.
The on-track action at Hockenheim resumes on Saturday morning with FP3 on the NBC Sports app from 5am ET ahead of qualifying on NBCSN at 8am.
“I’m so excited to join Andretti United Extreme E,” Munnings said in a release. ““I was really intrigued when I first heard about Extreme E, I just knew I had to be involved. The male / female racing partnership is a fantastic and exciting new concept. The season has incredible locations and the racing will be very exciting. It will be a new challenge for the teams and drivers, and I’m so thrilled to be working with such a strong team.
“The championship is a really innovative concept, it’s combining motorsport and science and will produce an important legacy in each race location. Bringing the platform that motorsport has in line with the awareness that the planet needs right now is awesome and a really important message.”
Said Hansen: “Going into the Extreme E will be a new chapter in my career, one that I am extremely excited about. It is something brand new, not only for me, but the whole of motorsport. The format is something
we’ve never seen before. I’m also delighted to be able to carry the message of something bigger – talking about the environment and doing something good for the world – that’s something that really drives me. It’s going to be a big adventure in life to see these locations and I’m going to do my best in carrying this responsibility and hopefully making people aware of the challenges we have in the world, together with our passion for racing.”