Volks,
  I'm putting a new stereo system in Mudskipper.  Thanks to my multimeter,
  and a new box of 15 amp fuses (doh!), I've located the battery lead, but
  it appears to be always hot.  The head unit I've purchased (Pioneer
  DEH-P4400) has two power inputs: one for the "terminal always supplied
  with power regardless of ignition position" and one for the "terminal
  controlled by the ignition switch."   I figured, hey European cars are always wired hot, there is no
   "accessory" ignition position, but the DEH-P4400 manual cautions
   thusly: "the red lead should be connected to a terminal coupled with
   ignition ON/OFF operations.  If this is not done, the vehicle battery
   may be drained when you are away from the vehicle . . ."   Does this mysterious lead ring any bells?  The Bentley diagram is a
   little confusing.
Many thanks,
d.
1990 GL -- "Mudskipper"