Why did all the lights on the dash come on and the LOW stay in gear? on 2000 Mercedes-Benz ML430

we changed a fuse because the radio wouldn't turn on. Then the CODE came up. We tried what we thought were the codes to no avail. Now I am stuck in LOW, the engine light is on. What do I do?

Asked by for the 2000 Mercedes-Benz ML430
Go to a parts store that gives free engine code reads like autozone and post the code results on here.
Took the vehicle to Autozone as you suggested. Fuses, fuses, fuses. It was stuck in LOW because the fuse to the Transfer case was out. Put in another fuse and BAM! The LOW light went out and the car was no longer in LOW. Disconnected the battery and the engine light went out. Everything is back to normal. Thanks for the great advice.
Thank you so much. I have been looking for something like this for so long.