Thanks for the explanations on the different types! After listening for a couple days I am very satisfied with the current setup. If I outgrow the type E it sounds like the next best option is the Type S. I really don't want to make a deeper box if I don't have to .
I am still struggling to find the correct antenna adapter (I know the model #), no one seems to stock it around me so I will be ordering online.
The last bit of the project is hard-wiring a power source for the external hard drive. I do not want to have it plugged into the cigarette lighter all the time, because I have the base coupe I might pick up a fog light switch and wire it to that for a nice clean setup.
Can anyone confirm if the switch retains its setting when the car is turned on/off?
I also recall a post somewhere that said the buttons were similar to another model (but possible black), perhaps another chrysler model? I may need to go that route if I can't locate one specifically for the xf.