Steady heating Removing runtime restriction

Moin, have the SH active in my V70 D5 EZ 02. Since I do now also from time to time holiday tours in areas where it is partly still quite cold in spring and autumn (a small selection on my side ) and I spend the night in the vehicle, I also use the SH sometimes at night. However, this switches off by immediately start or by timer after a certain time. That is quite annoying if it is short minus degrees and then one somehow the night over by means of timer 1, timer 2. I have a good sleeping bag that keeps you still warm even in low temperatures but with SH it should also be different. I have now learned from an acquaintance with VW bus, which can be lifted by a small change in its standard SH the time limit. Is there such a thing also with the “elk heating”? I know very well, that then probably the battery and fuel monitoring will not work anymore. ends in the mountains of Serbia and Montenegro for mountain biking – but only in autumn