I bought the vehicle on May 2010 at Kondapur, Hyderabad. I booked Chevy Spark LS - BSIV.The car was delayed for two weeks saying they have to get BS IV approval from RTO. At the time of delivery after all the formalities were done I saw in the papers that aBSIII vehicle was delivered. The staff apologized for the mistake and promised me to refund the excess amount. After 45 days they called me and told me that they took money only for BSIII. So, please be aware of this while purchasing a new car.
Enquire about the dealer before buying a car.