Good way to study for this test:
1) Use the online study link from BAFM http://oet.bamf.de/pls/oetut/f?p=524:1:1031279109152684
2) Pace yourself, take on maybe 20 questions at a time.
3) Make a short list of the questions (by number) that you missed.
4) Go back and review missed questions by simply scrolling to those questions again.
Chances are, you will be able to answer many of these questions correctly on the first try. That cuts the work down to size. I reviewed the questions two weeks before the actual test, then made sure I went through the whole 250 questions a few times the week of the actual test.
Remember, on test day the questions, as well as the muliple choice answers beneath them, look EXACTLY like they do on the BAFM practice page.