1985 300TD - Mysterious Intermittent Starting Problem

9 times out of 10 my car starts immediately no problem. 1 time out of 10 there is a click and then nothing. After several attempts I can get the car started and then everything is OK for a couple more days...

Here's the mystery. I had my shop check the solenoid (OK) and replace the ignition switch using the kit sold on this site. Everything was fine for a couple of days, then the same problem occurred. We can almost live with the problem but I'm concerned that one day we won't be able to start it at all.

My shop now recommends stripping down the starter motor itself. Is this the right thing to do? Anything else to try?

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