Honestly the '2nd' item on the list is really not a large concern. Installing a quality fused aftermarket piece whether it is an amp, and iPod kit or a phone charger is safe and is not a fire hazard.

We had a customer with a DICE and XM Direct and his X5 was involved in an accident. After the shop fixed the car nothing worked. Found out the battery cable was replaced from the rear to the front. Low and behold when that battery cable was sliced it obviously shorted a lot of items out. Both the fuse for the DICE and the XM both popped as they should. New fuses and back up and running.

I had an amp do the whole sudden fire thing and while there was a little smoke both amp fuses poppped and all was well. That is what fuses are. The most important thing is proper amperage rating. If you pop a 5amp fuse and put in a 10amp you may melt the wire and actually cause a fire...

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2009 E70 X5 - Third Row - Rear DVD
Past - 04 4.4i Sport Package