Try disconnecting the plug/wire that connects to and powers the auto antenna. I did and my battery stopped draining and my courtesy door/puddle lights started to work properly.

I have no idea where the glitch actually is, but this worked for me.

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87 300e (white/black; amg body kit)
88 300ce (red/cream; amg body kit)
93 300ce cabrio (white/blue/blue top)
93 300ce cabrio (black/grey/black top)
98 ml 320 (totaled @ 137,000 miles)
99 clk320 (black/grey/black top)