The starter failed today. The starter solenoid fell apart inside the starter. Removed and replaced it. While re-installing the positive battery, the terminal fell apart. Replaced that and now The Merc is operational. One problem I noticed after putting everything back together, was that I routed the starter cable a bit too close to the headers. Before I get out of the garage, I will adjust that cable location.
Adjusted the starter motor positive cable so that it is further away from the header.