strong jerk when switching from p to r

hello, yesterday I noticed the following: was with the baker, I switched the car to p, let the engine continue running, then back into the car and when switching to r came a heavy jerk. and the lever was difficult to press when switching from p to r. you also heard a “crack” when switching. is that normal?? am tomorrow anyway at mb, would like to know before that is already normal so that I can complain about it and am also sure that it is not normal (habe mb-europa-ga rantie and the car acquired before 4 weeks about) mfg and all still a nice weekend