It will be for auxiliary heater, you cannot find settings in MMI because it is only auxiliary heater not parking heater. It is working when engine is working and cold to help engine war up. You cannot switch it on on-demand, you need parking heater option/upgrade for that
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Currently 8less
2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D
8 history:
2006 A8 Sport 4.2TDI quattro SOLD,
1997 S8, reached end of life with gearbox failure
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