MERCURE PARIS GARE DE LYON TGV. . MERCURE PARIS GARE DE LYON TGV: Easy access from Gare de Lyon train station and just a 2-minute walk from the platforms (from the metro or train station, take exit 7 for Rue de Bercy or exit 6 for Tour de L'Horloge). By car, on the Boulevard Peripherique, take the Porte de Bercy exit and follow signs for Paris-Centre. The underground public car park is located at 198 Rue de Bercy. The hotel is 65 yd (60 m) away at 2 Place Louis Armand.