HU = used car check?

Hello, I am about to buy a used car. On me the car makes a good impression, but for safety reasons I want to have it checked again professionally. Is it enough, if I have a HU carried out here, e.g. at the DEKRA? Are there parts on the car, which are not noticed, but perhaps with a special used car check? How extensive is the analysis of the DEKRA? Suppose nothing is found, then I can be sure (as a matter of fact) that the car is also good in shot (that’s how I mean possible defects that are already in progress – I don’t mean that the DEKRA tells me what could eventually break in the future)? Thank you for your answers!