Majority of bank charges 1% of the balance loan amount. So you can't do away with the charges.
You cannot transfer the ownership without a letter from the bank, that is if you took a car loan. No need for bank letter if you purchase the car by personal loan which is higher in interest. Also check at the back of your car registration, if written in arabic that say, under installment. if exist then you need a letter from the back, it's like a NOC stating that you'd paid the loan. Anybody selling a car under loan will always loose some amount due to the bank charges. However check if your bank allow to carry over the loan to your buyer's bank account, if your in the same bank, that way, you'll not be charge for the 1% penalty for closing the loan early