The saga of the auction bought 1992 300e 3.2

So, when I bought the car there was a fuse in the console.. and a missing fuse in slot 9. Radio, interior lights, yada yada.

Put the fuse in everything works.. but the next day the battery was dead.

Took the fuse out, and no problems..

Any idea what on that circuit could be draining the battery?

TW