Hi, is it ok to remove the front seat in my 2007 e93 I want to access woofer and do a good clean. I've been told to disconnect the battery for twenty minutes first and everything should be fine. But I might be left with a fault when I plug it all back in. Can anyone elaborate on this for me and also when I found the battery it looks technical to remove is there a how to on this anywhere and will disconnecting the battery mess anything else up. A friend of mine said on his vw if he removes the battery he has to reset the one touch window function does anything happen like this with a bmw?