The source of the Warnow is in Grebbin at the western end of the Mecklenburg Lake District .
Grebbin is a small village 10 kilometres ( 6 mi ) north of Parchim .
The source of the Warnow is in Grebbin , a small village 10 kilometres ( 6 mi ) north of Parchim , at the western end of the Mecklenburg Lake District .