I have a fully loaded, navi, comfort access, all the options bmw 335xi 2008 coupe, the clock has 62,000 miles.
The screen lights up with "battery discharge", or picture of battery on the dash if the doors are open too long or if the car is off and just the radio is on.
I have never replaced the cell, and want to know how long these batteries last? Where to buy from and how much they cost, and how hard is it to install?
Any tips or advice is much appreciated
