I understand the Base Module performs the same functions as an OVP. I'm getting power to the 15 AMP fuses, but this is uncharted territory for me. Never heard of anyone having to replace a BM but if OVP go bad who knows.

An Benz guy running a shop in Chicago told me the order to replace parts that he follows is harness, MAS, ETA then Base module if all else fails.

Checked the MAS harness by bending it around along with the ETA to see if something would change. Zip.