Hmmm..not really sure. I have had the same problem too in the past. But it only happens once in a blue moon, so it never bothered me enough to really check it out. I just figured it's probably just a programming glitch where the car registers it as a different command from the key.

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Lemans Blue X5 4.8is
Dynaudio
Diamond TDX 12" subs x 2
Xtant X604 x 2
Xtant X1001 x 1
VST 7" LCD x 2