Hello, in the last weeks the power steering light is not on so car is not showing any problem, but when driving on parking lot in 1st gear after few minutes the steering gets stiff and then completely fails.
When I drive on the road a bit higher speed then it slowly returns ti normal and can once again do full turn both ways while not moving.

Today I parked it for 30 minutes, and when I came back to leave the power steering was not working, once I got out and on the road it slowly gets to normal again. No driving in 1st gear this time.
Any idea on this intermitten failure ? Servo fluid is between min and max, tire prezsure is ok.