My e34 520 had a little symbol on the screen when the chime was swiched on like this (((o . Should my M3 have a symbol?
I have heard that there are switches on the back of the OBC what do they do? (i think one is for temperature dispaly) is it possible that the chime has been swiched off?
it is connected cos there is a plug with 3 wires going to it