My ETS light, BAS light, Break light, break light and check engine lights are on

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My ETS light, BAS light, Break light, break light and check engine lights are on. Dealer 1 says the computer indicates low voltage and changed the battery. I drove the suv for 2 days and all the lights came on. Dealer 2 say is fuse box and replaced the fuse. I drove the SUV for 1 day and all the lights came back on. What may be causing this problem that these two dealer have mis diagnosed? My SUV is ML 500.