Quote Originally Posted by Gunnark100 View Post
If you replace battery without connected power source under hood, all you need after is sync your key(some cases no need) and windows and adjust time and clear error codes, 2min job. No other settings will be lost(at least not on my car), had battery disconnected "few" times!

And if you getting same battery as your old, just change last digit of your battery code(serial) under gateway module 19!
Will this work, if i have access to another 12V battery, can i run jumper cables from the other battery and connect it to the battery terminals in trunk of car. Then swap batteries. Then, disconnect jumper cables?

Note, i don't have VAG-Com