Fuse C is the alarm and a few other things, fuse 9 is the radio. The total draw borders on excessive, the radio circuit being most of it. As Joe pointed out this shouldn't take out a battery unless left sitting a long time. We usually get upset if the total current gets to 100ma, Although this amount is more common on later cars with many control units with memory.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician