I just bought a 2004 S4 and just installed my radar detector. I have always "hard-wired" the thing in prior cars since I don't like the dangling power cord going to the cig-lighter.
All prior vehicles have had an accessory fuse that I could use that only has power with the ignition on. I cannot find a fuse thus far that is similar. I have it piggy-backed on the cig-lighter fuse now, but it's always on.
Question: Is there a fuse in the accessible fuse box on the S4 that is only on when the ignition is on?
Thanks, Keith