I would love to get an auxiliary heater system but I can't seem to find one for a gasoline car. All the ones I'm finding are webasto diesel versions.Well my 07 730i refused to start when it was -30-35°C last winter although with half bad battery drain problem.
But you should really consider buying an engine warmer (block heater) if you want that engine to last.
Or an auxiliary heater system but that's in a completely different league.
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