My bmw 318i 1999 1900cc car key batteries have gone dead. Now I have to unlock manually how do i reprogram?

Hi Guys, I have a 318i bmw 1999 and the key batteries have gone dead I have replaced them but apparently I have to reprogram the keys to the car. Can some one show me the sequence i have to follow in order to reprogram the keys for this car model.My bmw 318i 1999 1900cc car key batteries have gone dead. Now I have to unlock manually how do i reprogram?Look in the owner's manual. It is pretty common when the battery is replaced in a modern remote because the remote starts the rolling code sequence from the beginning while the car is looking for the next ones where it left off. The process is called "resyncing".My bmw 318i 1999 1900cc car key batteries have gone dead. Now I have to unlock manually how do i reprogram?take it to a bmw dealer . i had to do that with my dodge ram they didnt charge me to do it . it only took a few minutes.My bmw 318i 1999 1900cc car key batteries have gone dead. Now I have to unlock manually how do i reprogram?You have a Boy Meets World car key? Nice.