Tata Motors today said it was expecting 15 to 20% growth in the sales of Indigo and Indigo Marina, with the incorporation of new features."With the introduction of premium features in Indigo and Indigo Marina, we expect the sales of these cars to jump by 15 to 20%," said Deepankar Tiwari, Assistant General Manager after launching the new range of Indigo and Indigo Marina.Tata Motors, which holds 33% market share in C-segment cars, currently sells 4000 units per month in the country."We find NCR, Mumbai, Hyderabad, Chennai and Punjab as potential markets for us," said Tiwari.The company has introduced premium features including new dual chamber headlamps, chrome lined fascia, chrome insert rub rails in Indigo sedan. While in Marina, the company has incorporated monochrome tail lamps, new bumper, new bumper, leather seats, video player.Till date, the company has sold over 1,25,000 Indigoes and Indigo Marinas on the Indian roads