Famous former F1 driver manager Willi Weber has announced he is now retired from formula one.

Once known as 'Mr 20 per cent' from his lucrative days as Michael and Ralf Schumacher's manager, the German is also no longer involved in the management of Force India driver Nico Hulkenberg's career.

He will turn 70 on Sunday, revealing to the DAPD news agency that the famous Schumachers will not be there to help him celebrate in Mallorca.

"When Michael is in Stuttgart we meet, but not to discuss formula one. I hope we continue like that for many years," said Weber.

Apart from that, he insists his F1 days are over -- even if Sebastian Vettel were to decide he needs a manager.

"No, not any more. Thankyou, but for a long time I managed the best drivers in the world and that's enough for me," said the German.