sentences:  The Heilbronn plant remained Volvo's German headquarters for buses until 2010, when the administration moved to Ismaning near Munich and the used buses department to Lohfelden near Kassel.Pullman series
  
  Comet series
  
  Double-deckers
  
  Even before the Volvo takeover, they had started a partnership with Drögmöller for new coaches.Starting the development in 1992, the first new coach was the Volvo B12-500, inheriting the characteristics of the E320 EuroPullman, with the backward leaning windscreen from the recent Comets.