From Montparnasse metro station, follow the "TGV Grandes Lignes" sign, then "Gare Montparnasse Vaugirard 3", go along track 24 and enter Hall 3. When you exit the station, the hotel is located in front of you.
By car: coming from the ring road, take the Porte de Versailles exit, follow the rue de Vaugirard, take the Boulevard Pasteur on your right, take the rue du Cotentin on your right.