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Help with MMI on 2005 A6

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Old 07-27-2013, 01:50 PM
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Default Help with MMI on 2005 A6

I have some battery drain as my battery drain when I dont drive for like 3-4 days and have to charge the battery again.
Anyways, after charging the battery, my MMI comes on and shuts off, so my radio, nav etc. does not work.
I hooked up the VAGCOM from Ross Tech and cleared all codes.
I checked all the fuses and all look ok.
I noticed that my floor mat was a bit wet on the passenger footwell.
Any help would be great
Old 07-29-2013, 03:29 PM
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mine does that as my ignition switch is on the way out ( in the middle of replacing it )

good luck finding the problem
Old 07-30-2013, 06:10 AM
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Default battery drain issue in 2005 A6

After battery drained and was recharged, MMI stopped working.
So, disconnecting the battery from the car overnight and reconnecting it,
MMI started working again.
I also found lots of leaves behind the firewall, so spent like 2 hours
removing them. My roof drains were clean.
So, have to now find out what is draining the battery.
In the mean time, I connected a gadget called Priority Start that connects to your battery, and electronically shuts off the power to the car when it senses a more than normal battery drain, and you can wake it up by turning the ignition on and pressing the brake and the car wakes up.
So, will let the car sit for like 5 days and check if this gadget disconnects the battery electronically, then I know something is still trying to drain the battery.
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