I originally had ver18.2 and in my 2002 540 MK3 (that came with the car) and now that I install the update v31 I lossed the nav voice. It's so faint you can hardly hear her. I don't think I have the TP Volume I looked in the manuel.... What to do next?? I would like to be able to hear my nav voice. Could I install another v31 download?? Maybe the night one? I don't have any other v31 to install unless you have a link to another one? And will that fix the nav volume?? Or do I do the second step GAL. (Oh if I install another software version do I have to go to a lower number then come back up to ver 31 I read that somewhere is that true?) I greatly appreciate you responding to me and helping get this corrected. Once again thank you