If you have seen an auto gear in some 2005 model Mehran, then it can also be done in the brand new car. Brand new engine doesn't matter, but the question is why?
Why would you like to do it, especially with a brand new car?
Won't it be better that instead of going for all such hassle, you already buy a used JDM car, which is already AT / CVT from the company?
I won't advise to go for converting your brand new Mehran car, from MT to AT.
Rest, your car and money, your choice! 