you know... that's the only thing i noticed that was weird...

i had a button fixed on the first week..but no problems since...

now you mention this screen brightness thing and it is definitely happening to me..

i adjust and it reverts back to the default mid setting...

i even tried to "save" the setting by inserting the keybod into the ignition, then i tried saving it by hitting one of the memory seat buttons...

i tried everything that would allow me to "save" a setting...

nothing... comes right back! (and i have an 08 with latest firmware version with the exception of 28.0 that came out last month)

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2012 X5 50i M-Sport
2014 X3 35i M-Sport