Mercedes motorsport boss Toto Wolff admits that, while he is excited by the up-and-coming talent on the marque's roster, there is not plan to rush them into F1.

Having finished 1-2 in last year's world championship, and looking likely to do so again in 2015, Wolff insists that he could not want for a better line-up than reigning champion Lewis Hamilton and team-mate Nico Rosberg, but he acknowledges that Mercedes would be well-served should anything happen in future.

DTM star Pascal Wehrlein has already shown what he can do behind the wheel of an F1 car, having shown well in testing with both the W06 and Force India's VJM08, while Esteban Ocon - who has also tested with Force India and was picked up by the Three Pointed Star when he was released by Lotus - has shown his ability on the F1 support package this season.

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"We are very happy with Nico and Lewis and the car - this is our line-up and I wouldn't want to change anything on that particular topic," the Austrian claimed, "But you need to look into the future and Pascal and Esteban are definitely two of the young drivers who have shown great skill.

"Pascal we obviously know much better because he has been with us for a long while in F3 and DTM and as our third driver with Force India. They were very impressed."

Wolff admitted that carry too much young talent could be a burden, however, and conceded that Ocon's position on the depth chart was not as secure as Wehrlein's.

"With Esteban, it's not clear how it's going to continue," he explained, "We have an option on him which we're going to decide whether we will exercise towards the end of the season. It depends on how he continues to perform in GP3, but this is actually not a short-term - nor medium-term - strategy, but only long-term."

Hamilton and Rosberg are both locked up for at least the 2016 F1 season, and will form part of what looks likely to be a largely unchanged grid, with Ferrari, Red Bull and Williams also expected to retain their current line-ups.