As best I can remember having stripped a Bosch solenoid on a pal`s 928, many years ago...as you typed Richard, the end cap on the solenoid had two soldered connections for the coil ends, which required to be unsoldered to remove the cap and expose the innards.... The copper disc which shorts the the battery terminal to the starter motor winding terminal was deeply pitted where it made contact with both terminals. It was just a case of cleaning up the contact points on both terminals and turning the disc to present that which was it`s reversed side to the terminals... Worked a treat.. I suspect by now solenoids will be constructed differently in that it may be impossible to strip and rebuild them...
