Got my Battery Replaced last week.
Before I took the car in to BMW I had a look at the voltages, when the car was not running the battery read 12.24V and 14.85V at idle.
I did this just to check if the alternator was charging it correctly, is this the case?
Once the battery was replaced I also noticed that the iDrive started up instantly where with the old battery it took a few seconds.
I went ahead and did a 90Ah upgrade and John from LeoHaese assisted me with it.
:ty: