"Theres no going back now, we can still turn this around, people are ready for change, we want change, we demand change and we are the change," Thunberg said.
The country has the highest number of youth protests planned for Friday, with more than 400 scheduled to take place.
"Yes, we must vote, you must vote, but remember that voting only will not be enough. We must keep going into the streets," Thunberg said that in direct reference to Sunday's election.
"(It’s not an overstatement to say) They simply don’t give a damn about us," she said talking about German politicians and political parties.
"We need to become all climate activists and we need to uproot the system," Thunberg added.