Set handbrake

Hello, a few weeks ago I was at the “small inspection” (cKM stand about 44.000). Yesterday I noticed that I can pull the handbrake up to the stop (6x click) and the car still moves with a light gas giving. Apart from the fact that I call the FOH, who did the inspection briefly (quality of his work etc. – so far I was very satisfied) the question arises to me whether I can not do it myself. lschraube” as before in the center console? – and how do I test the optimal setting. Hope for tips. Thanks Bommel