I know this is somewhat common with these cars. Is the usual cause the degradation of the batteries on the circuit board or a problem with the board itself? Any light that could be shed on this would be appreciated. Yahoo! Hotjobs: Enter the "Signing Bonus" Sweepstakes -- to be removed from bmw, see /bin/digest-subs.cgi or email "unsubscribe bmw" to majordomo@domain.elided