1984 300D

1.) New alt 129x alternator. (works fine)
2.) New Battery fully charged. (changed battery numerous times)
3.) Ground cables checked and okay.
4.) Additional heavy wiring to battery from alternator.
5.) New battery terminals.
6.) A drain it seems but it is not constant.

My car is possessed. I had done all of the above about 6 weeks ago after posting questions and getting feedback from forum. You see the car will be okay for what awhile and then bam, like Saturday afternoon it goes dead in the mall parking lot. My wife gets it home, I change the battery out that afternoon, and Monday morning the battery is totally dead. Nothing, nada.
What is weird is that when I pull the fuses and check for current drain, it's like sometimes it show's a drain and other times not. Tonight its in the garage and the "a" fuse which is the window lift, front right/rear left was showing a definite parasitic drain of anywhere between .12 to .05 volts when I turned off the lights and came in the house. This was without the fuse in the panel.Twenty minutes earlier it was zero. Another early reading today showed a drain of about .05 A few weeks ago I had no drain at all. When I put a multimeter between the battery positive terminal and the cable end the multimeter reads a steady .13 My daughter drives the car most of the time. She did mention that the rear drivers side window sometimes works. Its kinda of an iffy thing. So what do I do?

A. Pull door panel and check motor and wires behind panel?
B. Remove wood where window switches are located?
C. Shoot car? This is my vote.

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Cliff D.
Central Illinois
1987 300SDL 200K
1984 300D Turbo 245K