Hi Chris, thanks for posting back. Its very odd, tried it after getting the car and thought it must have packed in (had it a few years). Tried it in the Fiesta and fired up and worked a treat?. I dont get any power to it at all, wont turn on, no lights or anything yet other cig lighter powered devices work just fine. Very odd?
What make/model one do you use in your Z4 ?
Cheers
Tim