The Alzenau-based team was the last of the three manufacturers to have its all-new hybrid car up and running after some early delays.
There then followed a switch from the early prototype test car to the all-new car which arrived to test soon after the WRC season finale at FORUM8 ACI Rally Monza last month.
The Estonian was testing the car in the French Alps earlier this week, but drove it for the first time at the beginning of December.
“The guys have really done some proper job on this car,” said the 2019 world champion. “We have a strong new chassis and we have definitely taken some big steps forward.
“Of course, I would like to do as many kilometres as possible before the start of the season, but in the time I have driven the car already I can see the designers and the engineers have done a great job in a short time.
“We know we still have a job to do, but [this car] is promising for sure,” he added.
Tänak will be looking for an upturn in fortunes in 2022. He placed fifth in this year’s drivers’ championship having missed FORUM8 ACI Rally Monza for personal reasons and crashing out of the opening day in Spain in October.
His Hyundai Motorsport colleagues, Thierry Neuville and Oliver Solberg, will also test in France this week before returning to the Alps early next month to run their pre-event test for Rallye Monte-Carlo (20 - 23 January).