Valtteri Bottas is pushing hard to be ready for the 2017 season, according to Mercedes team chairman Niki Lauda.
The Finn Bottas was Mercedes's eleventh-hour pick to replace the suddenly-retired world champion Nico Rosberg for 2017.
"I'm always on the phone with Bottas," Lauda told Swiss newspaper Blick. "He wants to know everything, which is motivating me as well. He is getting full support from all of us."
After Mercedes won the last three titles, Formula 1 is all change for 2017, with wider tyres and much faster cars set to fill the grid.
Lauda said that the picture will start to emerge from the second Barcelona test.
"The first four days in Barcelona will be getting to know the new regulations," he said. "Then the four-day break will be to make updates.
"Then at the second test, no-one will bluff anymore because we will all want to know where we stand before Melbourne.
"The first three races are on totally different tracks, so by then we will know where we are heading."
Lauda said that he has seen the broad shape of the 2017 Mercedes car and he was "immediately enthusiastic".
"The fans will surely like what they see," he added.
The first grand prix of 2017 takes place in Melbourne on March 26.
