[jsf721]

I have a 2019 540 x drive and my wife has a 2017 530. We are happy with the cars.

I usually am the type to replace car batteries before I get stuck. However I think these cars have multiple batteries and are Uber expensive.

Can someone educate me on the location of the batteries, and what each controls?

Also are these diy serviceable for someone who can change a regular car battery ?

What about saving computer settings while changing batteries?

Thanks