Manor's racing director Dave Ryan says Pascal Wehrlein's experience in the Mercedes F1 car is key for his team to understand and develop its MRT05.

The British team has switched to Mercedes power units along with Williams supplying its transmission for 2016 and with a refreshed setup the team spent the majority of pre-season testing familiarising itself with its new components.

Ryan, a former McLaren chief, says securing Wehrlein's services has been vital to get a better and quicker understanding of the Mercedes engine.

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The German driver acted as Mercedes test driver for the past two seasons as well as a stint testing for Force India and is the only other driver on the F1 grid who has run the dominant Mercedes car.

Manor's racing director says the 21-year-old rookie has been a pleasure working with and has already become an vital member of the team looking to develop with power unit.

"He is certainly able to produce a good reference point as he is familiar with the best car on the grid from last year," Ryan said. "He already had a reference point for every part of the car so he can drive our car and refer back to last year to help us decide what areas of development we need to work on.

"He is a very nice kid. He is obviously very talented and fits in extremely well. He hasn't shown any signs of pressure and I don't expect to see that as he is here on merit and capable of doing the job for us."

Ryan says it would be foolish to guess what results Manor could produce this year but has reiterated the team's new focus to be competitive and aim for points finishes during 2016.

"We want to compete and would like to score points," he said. "We want to do the very best with what we have, we've had a few years when we have turned up to make up the numbers and we are not interested in doing that anymore."