Where is the best point to splice off a spare power line? Previously, in my Mk3 Golf, I just used to pull out a non-essential fuse (interior lights, etc) and then stuff a stripped wire in the one side and then push the fuse back in (obviously making sure whatever I had wired in was also fused) and then I'd wire the ground to a grounding point on the metal structure under the dash (near the fuse box). I knwo this is hardly the "recommended route", but I was wanting to see what the recommended method for wiring in something on the Audi A4 would be. Anybody got any diagrams / how-to's that would point me in the right direction? I jsut need a few photo's to see where to get started. Preferably with a choice of "permanently "on and "ignition controlled" options? Although I can always work these out for myself... I'm looking to wire in a GPS/laser/radar camera detector (v low current) on the ignition controlled circuit and then also to mount cigarette socket and USB charger on the permanent circuit (yes, I know - can cause battery drain, but I'll probably put an in-line switch to limit the scope of this). Any help / links appreciated! edit: this is relation to my B6 A4 Quattro TDi.