Came back from about 3 weeks of not driving to find 1990 240 sedan's battery dead. Jumped the car and charged it for a bit, but now if I don't drive it for more than about a week it's either dead again or tough to start.

Disconnected battery and checked current draw --- found that there was about 160 mA draw when the key is out. Checked fuse 8, and there's 160 mA being pulled through there. Disconnected the radio, made sure the trunk, hood, glove box, and overhead lights were out, disconnected the central locking wire from under the dash and then the plug inside the door: still 160 mA! It's getting annoying having to pull fuse 8 anytime I'm going to parked for a few days, just in case. From what I can tell, there should only be about 5-10 mA normally.

Any suggestions for something else connected to this fuse that could be causing the current draw?