Gearbox question, who can answer it

Question : what happens if you switch from D to the parking position at 10 – 15 km/h, if necessary even at higher speeds ( VOLVO 850 Bj. 95 ) If you don’t want to try it in the test, the risk is too great for me. But think that the designers during the development have also thought about that something can happen. Thanks for the answers. UFrank