Originally Posted by cmyachtie

Considering your history from what you posted I would find a good BMW dealer with a good software guy and have the software (whole car ) reloaded. Should only cost $250 max. And see what happens think it's worth a shot before replacing the rack.
Due to low voltage by battery failing things can get real squirrelly with these cars, when I got mine it was 8 yrs old and only had 63000kms that's les than 40Kmiles and had battery go south many times due to sitting instead of being driven I had all kinds of weird things happen the first yer I drove it and spend more time with it hooked up,to,my laptop running INPA, DIS and more to,try to get it fixed and finally after talking to several of my local experts here got a new me of a good BMW computer guy working at my local dealer and told him that I wanted the software reloaded, after over an hour the tech came and told me the cluster was shot and needed for re placement Imtold him. Noway as I had already tried that so he went back and tried again and they got everything working right it can be tricky....