Even after securing five Championship titles, four of them with Mercedes, Lewis is far from done, according to Toto: "I think if he is motivated and enjoys what he is doing, he can go on for many more years. As long as we can provide a car with which he can win a Championship and he continues to drive like he does, this can be a relationship forever.
"But the reason why he has won that fifth Championship is that he concentrates on the job in hand and doesn't look too far away. Because before reaching seven, there is a sixth to win, and we haven't scored a single point towards that one yet."
After winning five Drivers' Championships in a row, fans and the media inevitably draw comparisons with the Ferrari era of Michael Schumacher in the early 2000s.
However, Toto isn't getting carried away by that thought: "I think you can only count records once you close the book, and I don't see us closing the book at the moment.
"We enjoy what we do, and that is why I am not looking at this. I remember, when I was much younger, following Ferrari in the years they dominated in the 2000s. They were the benchmark for many years. We are on a similar trajectory, but we are not there yet. That's why these objectives keep motivating us."