Keke Rosberg explains why he became an F1 'recluse'

The 1982 world champion purposely retreated from F1 in 2010 and did not give a major interview until late-2016 in Abu Dhabi, after his son won the title.

Nico convinced his father to drive a 1982 Williams in Monaco last week as part of a joint-demonstration, and the two filmed an interview together afterwards that has been posted on the ex-Mercedes driver's YouTube channel.

Interviewer Martin Brundle comments in the video that Keke's presence is rare because he has been camera shy, to which the 69-year-old replies: "I am! I've withdrawn completely out of the public eye since 2010, really. I know it was the right decision.

"It mainly came because active drivers were very difficult to get. So, [journalists say] 'dad's there, he's got nothing to do, let's ask him'.

"I found myself being in the public eye much more than I should have been on my own merit, only to comment about him.

"I said 'No, no, I can't continue with this'. I just categorically stopped everything and became a recluse!"

Keke mainly followed his son's progress by watching on television at home as a "nervous" supporter, but it was not the first time he backed away from Nico's career.

He said the focus when Nico was racing karts was "spending weekends with your boy and letting him go as far as your wings carry you".

He then opted not to manage him in the way he did Finnish drivers JJ Lehto and Mika Hakkinen, which Nico said he was grateful for and said came at the "perfect" time.

Keke said: "When I said 'Jump' and he said 'Why?', I knew it was time to stop.

"That was my biggest achievement, that I'd let him go at exactly the right moment."

The second-generation Rosberg retired from F1 after winning the title in 2016.

Keke revealed he found out about Nico's decision to retire indirectly, but said he now sees "a very happy son" and "that's what counts".

"I got the message from my wife, who had received a text message from Nico," said Keke.

"The last sentence was, 'Please tell Dad too'. That's how I found out.

"When I retired my best friends said why are you stopping, it's too early, you're making so much money and you're having fun. It's a very personal decision.

"When Nico retired I was a bit like I'd been punched in the stomach and the air was out for a while.

"This is the instant reaction because I didn't expect it. But then you think it's his life, it's his choice and his racing.

"If he's decided it's time to go then it's time to go."