1982 300sd

the battery on my car keeps getting drained overnight. i tested at each fuse while the key was OUT. all fuse/circuits pull nothing except fuse/circuit 13 "clock, diagnostic, warning, radio" is pulling 0.8amps when the car is just sitting. is this about the regular amount or is that way too much for just the clock to be running?

thanks.
-philip

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1982 300sd from craigslist $800 greased on one tank with NO CONVERSION in the Hot Texas Sun. (currently dead & awaiting engine damage investigation and/or longblock swap)
new daily: '03 vw 5speed jetta tdi wagon. bagged&chipped