ill look it up for you

did you do a amp draw test on your battery?

It looks the largest relay you have controls these items-turn signal,heated rear window,wiper motor,time relay heated window

one of those devices is activating the relay when its not supposed. I would disconnect the items listed one by one until the drain goes away

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1986 300SDL, 211K,Dealership serviced its whole life
1991 190E 2.6(120k)
1983 300D(300k)
1977 300D(211k)