I didn't but its so easy its barely worth doing one. I got the idea from another forum user who did the same install so I just copied him. On 08+ 5's there is an access cover behind the parking brake that is big enough for an outlet. I bought an outlet at radio shack and used a stepped drill bit to make the hole. Then I fished the wires through the console and tied them into the existing lighter circuit. The YMMV part? If you drive with the seat all the way back, you can't plug in anything very tall. Drilling the hole closer to the brake would give you more clearance for bigger plugs but could interfere with the armrest when the seat isn't all the way back. I may look for another option in the future but this was about 20 minutes and you can get a new access door for very cheap and make it disappear. Even if I keep this location, I will order another port like the factory one so it's a color match with a hinged door as well! If others want a write up, I will put one together. I dont like cables everywhere so I have my radar hard wired from the mirror now.