The method 12, wherein when the circulation is performed with {TAIL ~ the engine} switched off, this circulation only occurs if or as long as the on board electrical system of the motor vehicle of {HEAD ~ the internal combustion engine} has sufficient energy reserves to start the engine again 
The method 12 , wherein when the circulation is performed with { TAIL ~ the engine } switched off , this circulation only occurs if or as long as the on board electrical system of the motor vehicle of { HEAD ~ the internal combustion engine } has sufficient energy reserves to start the engine again
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