Just now I tried to drive the car backwards on the ramp of the garage. I hope that this parking position can stop the oil loss at the transmission output. The ramp has a slope of 10° (17%). When the car is parked, I drive up the ramp, reducing the slope to 4° (7%). The guess is that the parking position with the front up will allow the oil to run out of the transmission.
Not knowing if the top would collide with the railing, I was very careful. However, this resulted in me not reaching the wheel well at the end of the ramp. The car only managed the incline with a run-up. It was not possible to start up again on the ramp. It took 5 attempts until I had the rear wheels in the trough.
The canopy is just above the railing of the ramp.
The car was very strained. The radiator boiled over. Let's see if parking in reverse solves the problem. With a little practice, I'm sure I'll get the car into the garage on the first try.