And just popped out one more thing in my mind: Its not recommended to have any electrical on at cold start, especially AC. It's inefficient anyway as the engine it's cold so the whatever settings are for temperature, are equal to nill/zero. Even in the Lexus manual is specific stated to avoid short time switches of AC (less then 5min) + to not mention the battery also.Its obvious that at cold start the engine, fuel pump, senzors, computer, all pumps, alternator etc needs power!! By having autolights, radio, AC, navigation On, it will only do more bad for sure, then good. That's just me anyway.