Dee ihe na-aga n'ihu maka paragraf a - N'afọ 1990, ya na ndị asọmpi ya nke atọ bụ Heinz-Harald Frentzen na Karl Wendlinger, sonyeere mmemme ịgba ọsọ Mercedes na World Sportscar Championship. Nke a bụ ihe a na-adịghị ahụkebe maka onye ọkwọ ụgbọala na-eto eto: ọtụtụ n'ime ndị ọgbọ Schumacher gbara asọmpi na Formula 3000 n'ụzọ nke Formula One. Agbanyeghị, Weber dụrụ Schumacher ọdụ na ikpughe na nnọkọ mgbasa ozi ọkachamara na ịnya ụgbọ ala dị ike n'ọsọ dị anya ga-enyere ọrụ ya aka. Na 1990 World Sportscar Championship oge, Schumacher meriri oge ikpeazụ na Autódromo Hermanos Rodríguez na Sauber <unk> Mercedes C11, ma mechie nke ise na Ọkwọ ụgbọala 'Championship n'agbanyeghị na ọ na-agba ọsọ na atọ n'ime agbụrụ itoolu. Ọ gara n'ihu na ndị otu na 1991 World Sportscar Championship oge, na-emeri ọzọ na ikpeazụ agbụrụ nke oge na Autopolis na Japan na a Sauber Mercedes-Benz C291, na-eduga na a itoolu ebe imecha na ọkwọ ụgbọala si Championship. Ọ gakwara asọmpi na Le Mans n'oge ahụ
, na-emecha nke ise n'ụgbọala ha na Wendlinger na Fritz Kreutzpointner na-akpakọrịta. N'afọ 1991, ọ gbara ọsọ n'otu agbụrụ na Japanese Formula 3000 Championship, wee bụrụ onye nke abụọ.