81. Why cut main power per manufacturer’s procedure after pre-loading vehicle inspection?

To prevent systems such as self-diagnostics and GPS tracking from drawing power continuously during the ocean voyage and draining the 12V auxiliary battery. If the auxiliary battery runs flat in transit, the vehicle cannot be started to drive off at the destination port, which seriously affects delivery and incurs additional handling charges. The main power must therefore be switched off per the manufacturer's procedure before loading, so as to cut off this hidden power drain.