I leave mine unlocked and keys inside for hours on end.
No worries. The HMI shuts off after about 1 hour. I doubt it used much juice.
I've got 20,000kms on the clock, had no dramas.
From what I can figure, only cars fitted with the bluetooth are having the problem? I don't have bluetooth and everything has been fine, so maybe for new buyers, avoid the bluetooth for a happy experience?
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