Some second semester courses at TUHH are defined as foundation examinations according to ASPO §14(3) and therefore have review courses plus in the second and partly in the third semester:
You´ll find all relevant info on review courses in the respective Stud.IP courses, which normally open shortly before the semester start.
=> search „review“ or „Repetitorium“, then look for the subject wanted
The links are also on the TUNE homepage.
For further information, please contact the institutes of Mathematics (E-10) and Mechanics (M-24, M-13) or the Student Counseling Center (Infothek).