Do I need to attend a Studienkolleg ?
Nepalese Higher secondary education(eg I.Com., 10+2 or equivalent) is not recognized as equivalent to german higher secondary education (Abitur). Abitur ends up with 13 years of Schooling, unlike ISc or 10+2 which takes 12 years of Schooling. That means the difference lies in 1 year of schooling. So you have to attend a Studienkolleg.