Charging issues

Ive been battling a charging issue on my 2011 S550 4MATIC for some time now. 3 brand new alternators, new battery and the voltage regulator replaced on the original and I'm still having issues. Is there a battery and/or alternator fuse/relay for these cars in this year group? Or possibly fuses/relays for the voltage regulator? Ive gone fuse hunting multiple times and cannot find fuses 1-6. It appears they start at 7 by the battery in the engine compartment. ANY help is greatly appreciated. Thank you.


