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U don't lose any settings when you take out the battery. Only thing you lose will be the time clock obviously. Seats, radio, etc are all retained.
However, if you take an extremely long time to change the battery, I assume it's safe to say you might lose some other settings.
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Current - 2012 AW/FR E92 M3 | 2014 AW X5 | 2015 MB S550 | 2016 RR V8 (White FTW)
Mods - BPMTune Stg1/Servo, Euro Visors & Side Mirror, IND Gloss Blk Pkg, OEM Perf. CF Trim/Spoiler, Grills, Lights, Pedals, Umnitza V4 AE, ModeCarbon GTS V1, 19" HRE P40
Sold - 2008 BSM/Black E92 335i |