Formula One returnee Esteban Ocon has revealed that he will offer advice about how Mercedes operate to new team Renault ahead of his return to the grid.

The Frenchman, who returned to a testing role with Mercedes last year after two years with Force India, makes a return to full-time racing this year with the Renault team. Ocon, who will partner Australia's Daniel Ricciardo for the 2020 season, reveals that he will provide insider knowledge from his former employers to help his new one progress up the field.

Speaking to Ouest France, the 23-year-old said: "I come from there (Mercedes) with a lot more technical knowledge, but also in other aspects of the organisation - the way they see things and the way they handle situations.

"This year I will of course share part of that to some extent, but you should always remain professional and not give away all the secrets."

One advantage Ocon has is that unlike an engineer, who has to wait at least a year to join another team, drivers can join straight away. The Frenchman also believes it is common that some knowledge is transferred when drivers move from team to team.

Renault held their official 2020 'launch' last week, only to show rendered pictures of the back and side of the car, and Ocon denies that the French manufacturer will be fielding an entirely unchanged car for the new season.

"There are a lot of changes to the car," the 2015 GP3 champion said. "You haven't seen them yet, but what has been done is really interesting.

"It's true to say that the car is from the same base, but in fact it's also very different."

Ocon and Renault will be able to show off their new car in full this week when the first winter test gets underway in Barcelona on Wednesday 19.