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.