Walked outside to get the newspaper this morning and heard a weird noise coming from the 240D

Dumb:

Sounded like the trunk area, popped the trunk and decided it was the antenna.
Pulled back the black plastic cover looking for wires, found a couple wires going to the antenna, cut one.
Apparently is was some kind of cable other than the antenna, problem persists.
Another wire, looked like a ground, cut it. Same problem.

Ran inside to see if there were similar situations on this board, found nothing specific.

Dumber:

Opened the fuse box, started popping out all the fuses to see which one would stop the motor noise. Found it.
After I found it I also found the schematic on the inside of the cover.

Dumbest:

Not wanting to leave the fuse out, it controls too many things, I ran inside to check out the Haynes. Radios are there, antennas are not.
Out of desperation I looked at the owners manual, usually kind of useless for diagnostics.
Lo and behold, the antenna switch has an off button. Cured it.