Arrivabene on Hamilton.
However, Arrivabene – who spent four years as Ferrari team principal between 2015 and 2018 – believes Hamilton has fallen into the same trap as Vettel by trying to broaden his influence.
He told Sky Italy: “Sebastian Vettel also sent such dossiers. He wrote, spoke and shared everything.”
On the value of Vettel’s documents to the team, he added: “Almost useless.
“I don’t want to say anything bad about Sebastian, but everyone should mind their own business.
“When a driver starts playing engineer, that’s it. Then it’s really over.
“Drivers spend two or three days in the simulator and get a general impression, but the devil is in the details.
“When the car is on the track, the driver must provide relevant feedback so that the engineers can make targeted improvements – especially when there is potential.”
Arrivabene famously rebuked Vettel towards the end of Ferrari’s winless 2016 season, publicly reminding the four-time world champion to focus on his own job.
He said at the time: “Sebastian just needs to focus on the car.
“He is a person who gives so much and this means he is interested in a bit of everything, so sometimes you have to re-focus him, remind him to be focused on the main job.”
Pretty much exactly how I feel about the situation and the role of the driver in development. Focus on car feedback but don't stray into engineering, and for the love of god, don't send dossiers.