As Lewis Hamilton contests what could be his record eighth F1 world title, Rosberg continues to embark on a career in sustainability.
But he says his relationship with Hamilton is no longer fractious, as his RXR team prepares to go up against Hamilton’s own X44 team in Extreme E.
“It would be great to replicate Lewis v Nico in Extreme E – fighting between the two cars would be awesome,” he said, though the pair will not actually race in the series themselves.
Rosberg and Hamilton raced during a famously tumultuous period as team-mates at Mercedes in F1 between 2013 and 2016, which included colliding on track three times.
Rosberg beat Hamilton, 36, to the 2016 F1 world championship, having lost out the previous two seasons, then immediately retired.
“It’s a very neutral relationship,” adds Rosberg. “We both live in Monaco, so once in a while we do bump into each other at the shops.”
As well as promoting climate change issues, Extreme E will highlight gender quality by running one male and one female driver in each team.
Rosberg has Johan Kristoffersson and Molly Taylor in the car for RXR, while Hamilton is running nine-time world rally champion Sebastien Loeb and Cristina Gutierrez.