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2011 Superb 3T5 battery going flat after a day or so of no use.

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Hello again

another issue Im struggling with is the battery, even when replaced with a new one, goes flat after a day or so of no driving. I check the voltage after driving & it is fully charged. I have replaced batteries a couple of times. but the issue remains. I've opened thedoors bonnet & tailgate, witht hthe locks closed, left the car for an hour & 1/2 so that it shuts down, have looked at he amperage drawn across the fuses & found the fuse 17(?) under rthe dash is active. this feeeds the radio & fwe other bits & pieces. How canI make this circuit go into sleep mode with the rest of the car?

Probably you have some issues with your infotainment unit - what is it?

  • Author

not sure of the make but it runs Android Infotainment. I have heard that it could be a canbus issue not shutting down the radio unit like all other systems when the car goes to into sleep mode after an hour? if so, can the canbus be replaced/firmware upgraded perhaps? Iknow of several other superb owners have had similar issues with this issue

Take it to a sparky that is conversant with the foibles of VAG cars.. All systems should shut down within 30 mins if car is locked.if its not locked things can remain somewhat live

  • Author

Hey ex kiwi,

Yeh I tested with all doors etc in their locked positions, definitely everything is shutdown, but do get an amp reading on the fuse for the radio circuit with everything else in sleep mode. Btw I have taken to a sparky & they're as perplexed by this as.i am

What happens if you pull the fuse and then lock it up and wait and see

Edited by Exkiwi

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