Re: cigarett lighter blowing fuses
The designs of some plugs can cause a short in cigarette lighter outlets, but not auxiliary power outlets. Cig lighter outlets have a different kind of center contact that is larger than a normal aux power outlet due to the bimetal latching mechanism.
I've done this before in a Mercedes E320. My brother's Subaru even prohibits in the manual the use of anything but a cigarette lighter in its socket saying to use the aux outlet in the center armrest instead.
2015 WK2 EcoDiesel Overland 4x4 Billet Silver, ORAII, ATG
1990 Mercedes-Benz 300D 2.5 Turbo - 155k
No sparks allowed!