Tata Zest - Not an easy drive

I think people on this forum are all talking good about the car. I own XMS petrol version for past 2.5 months now and I have driven it 1500 kms. I just got my first servicing done & had following problems,

1) The gear shifting was so difficult that it seemed to me that I am driving a truck. They 'reconditioned shifting mechanism' in the first service to resolve this issue. I still feel that its not upto the mark.

2) Car would switch off while the engine is cold while shifting gears. This is really annoying when you are driving in crowded & steep roads. In the first servicing they changed, 'relay sockets'. 

3) The front window would not close properly. They changed rubber beading for it. 

4) The gear stick would vibrate badly, especially on 3rd gear. - The service center said it will remain like this. 

Overall, I am not very satisfied with the performance. The mileage is 10km/l. The eco mode has so bad pickup that even buses & trucks would pass you while you are trying to accelerate. I have driven a Hyundai car for past 5 years and never had these problems which I faced in first 3 months of my drive with Tata Zest. Overall, I would rate the car 2/5.

Good looks, good music system, good interiorsBad Gearbox, Not very smooth to drive in city, mileage very less