"He's dealing well with Charles, they are two good teammates," Binotto told Motorsport.com.
"He is very smart, he is very motivated, and I think that even for him it could've been a lot more difficult, that start to the season.
"But overall I think he knows how good he can be, and he's smart enough to understand the entire situation.
"I think he's still very supportive with the team, with himself, and he knows that he is an important pillar of our team for the present and for the future."
Vettel won at Spa-Francorchamps last year but has not secured a grand prix victory since, having dropped out of last year's title challenge amid a similar run of on-track mistakes, including a collision with Lewis Hamilton at Monza.
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