AP level in German is year 7 (seven) in your high school?
Which probably means that year 5 in your high school may be more equivalent to year 3 or 4 in other high schools where AP level is year 4 or 5.
In any case, even in the absence of AP scores, colleges generally have their own foreign language placement procedures so that students who have some high school foreign language can start in the appropriate level course.