Auxiliary Battery change

[Bombx3]

Im about to change my battery ,do i need to back up the ecu codes like when the main battery was changed , its a 2003 E220
Thanks Ray

 

[AMGeed]

No you don't. And changing the main battery in the boot only means you have to reset the windows and sunroof. No ECU codes have to be backed up

 

[Bombx3]

Thanks for the reply , didnt know they fitted motor bike battery's in cars