so i inherited my grandfather's 2003 x5 and sometime this year he had the key/computer reset at the dealer since all of the functions stopped working. now i'm not sure if this was an issue before that but i can not set the time/date or anything for that matter. when i hold down on the clock button the only thing that happens is the colon starts to blink, no option to change time or anything appears.

I have disconnected the battery but nothing changed. it also does not power off when i turn off the car, i have to turn it off myself each time

oh and it randomly shuts off on it's own as well. it's all very strange