Sorry, I was in a hurry earlier. Well, making full payment makes the dealer Captain of the ship. Then the deal will be steered as per his wish. Well not every dealership is like that but there have been at least 2 such episodes where buying experience was the worst possible after paying full amount in advance. One was TFI member Bala when he bought Chevy Spark for his friend's mother and other was a member from CarWale forum when he bought Honda City. Besides TATA dealerships ranked at the bottom of buying and pre slaes exeprience of the customers in the JD Power survey. Just pay the booking amount, wait for the car to arrive, do a PDI and get the car checked to your satisfaction and make full payment. P.S.- My own car was scratched inside the dealer workshop 10 minutes before delivery while it was being washed for delivery. It was scratched at 3 places and visited the paint booth for a re paint. Maybe thats why I am asking you to be over cautious while going through this phase. Never take them for granted.