

I did not do that, and had no problems. I was worried about losing programming and/or needing to reset things. If Porsche recommends disconnecting the battery, or if there is some other good reason to do so, please let us know!
Curious why you are taking it off? There is a secret "campaign" to fix the speaker grill rattle, which they only tell you about if you complain....
If your still have any buzz or vibrations, try the Krytox stuff listed in the DIY pdf. It works miracles!
I was able to purchase on Amazon.