"Italians and Germans in a team can achieve great results. Not just in Formula One," the advertisement said, alongside a picture of the smiling German, who won the Monaco Grand Prix on Sunday for Italy's Ferrari.
Telecom wants its shareholders to back its audacious plans for a $81 billion merger with Deutsche Telekom and ditch a $65 billion cash, bond and share takeover bid from Olivetti, which reaches the finishing line on May 21.
Schumacher is acknowledged as Formula One's best driver and revered in Italy as the man who could take legendary Ferrari to its first world championship victory in 20 years.
"There are many examples of world successes born of the union of Italian and German experience, like our victory at (the San Marino Grand Prix at) Imola two weeks ago and our great one in Monte Carlo," Schumacher said in the advertisement.
