Good but not as expected

I am using this Tiago xz(Petrol) for more than one year. Plus:Handling, Space, riding comfort, music system. Minus: Fuel economy, service and NVH Economy is max 11- 12kmpl in city's and 15-16kmpl in highway with ac. I don't found much variation with city and eco mode. After my 3rd service also I am not getting any differences. Tata motors should cross check their economy comments. As usual Tata service is coming poor day by day. They are not properly attending customer complaints. For the same complaint I had to go personally 3 times. Still my issue is on. Vibration and dash board nose is more. Over all an average car.