Only opening an account will not help in applying for a car loan. You need to have salary transfer. And every bank is having their own salary criteria to avail a car loan.
If you are working in a reputed company or any of the Q Companies like Qatar Petroleum, Qatargas, rasgas, etc., with a minimum of 3 months salary transfers, car loan is at your door step.
Almost all the banks need at least one salary transfer to apply for a car loan.

Hope this clears your doubt!!

cheers...