The stricken F1 driver, who suffered a severe head injury in 2013, is part owner of several kart tracks across the country, which he has insisted are the “best training for big motorsport”.
But despite being the birthplace of the car, the popularity of Go-Karting in Germany is at an all-time low.
And a lack of interest in the grassroots motorsport is putting the development of new talent at risk, Michael’s younger brother Ralf Schumacher has warned.
He told the Cologne Express: “The dying of karting is a big problem for the German competitions, but above all for the promotion of young talent.
“Without go-kart tracks there will be no race drivers.”
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The track at Kerpen-Manheim, near Cologne, of which Michael is reportedly two-thirds owner, is due to be closed as it sits on the boundary of a new coal mine.
And increased government regulation combined with complaints about noise have also been blamed for the closure of similar circuits across the country.
Expressing his disappointment the seven-time World Championship winner was not able to encourage more youngsters to get involved, Kerpen-Manheim club president Gerhard Noack, 65, said: “Unfortunately, Michael can not help us.”
Attempts to find alternative locations for the track have proved fruitless, and although the circuit is not scheduled to be torn up until 2023, members are reportedly less than optimistic about the karting club’s future.
Michael Schumacher suffered a severe head injury while skiing with his 14-year-old son in the French Alps in December 2013.
The F1 legend fell and hit his head on a rock, which doctors said would have almost certainly killed him had he not been wearing a helmet.
After being rushed to Grenoble Hospital, his condition was described as “extremely serious” and the dad-of-two was put into a medically induced coma before undergoing two life-saving operations.
The record-breaking racer had largely shunned publicity during his career, and his family have continued to protect his privacy since his accident.
An update in April 2015 said Schumacher had shown “moments of consciousness and awakening”, and three months later his family confirmed he was no longer in a coma.
The F1 champion is reportedly continuing his rehabilitation from his home on the shores of Lake Geneva, but his family has been reluctant to release additional information on his condition.
Additional reporting by Monika Pallenberg.