We investigate the hypothesis of failed integration and low social mobility of immigrants. An intergenerational assimilation model is tested empirically on household survey data and validated against registry data provided by the Italian Embassy in Germany. Although we confirm substantial disparities between educational achievements of immigrants and natives, we find that the children of Italian immigrants exhibit high intergenerational mobility and no less opportunity than natives to achieve high schooling degrees. These findings suggest a rejection of the failed assimilation hypothesis. Additionally, we evaluate different patterns by time of arrival, Italian region of origin and language spoken at home.