Steve there are three modules or relays in the front passenger footwell. I am not sure which one's to dis-connect, so I will give you descriptions and part numbers and may be you can advise.
I will list these directionally from center console moving left to right towards passenger door. 1) MB 126 820 08 26, relay/module color is black with two black plug in connectors; 2) Bosch 0285 001 003, aluminum relay/module with one black connector; 3) Bosch 0285 100 014, aluminum relay/module with one black connector.
Hopefully this will help. There are other connectors in the footwell, but they are not directly connected to these relays/modules.
Appreciate your help. Johnny