[rking117]

Well i have read many thread about the recoding after replacement of a battery in the 1 series. I might be a little confused about as to why this is needed since the battery is just a power supply.

I have a couple questions.

1. Why first of all is it necessary to code the car to the new battery?
2. What harm would there be if we didnt recode the car?

This just seems strange to me. The manual says that there are convenience buttons that will need to be programmed. What convenience buttons are they talking about? Is there anyway around that like keeping the car powered up with a seperate battery while changing the battery in the trunk?