This one has me stumped so any random thoughts or ideas are acceptable

1999 300D Not a daily driver but frequent driver. Went to turn into driveway and the engine stopped just like you turn key off. Tried to restart several cycles and no go. Got tractor out and pulled into driveway and it started and ran for about 10 minutes and stopped again.
Things I looked at/checked/tested
No codes on my simple OBDII reader
Battery checks good with meter and load tested good.
No obvious wiring defects, unplugs, anything obvious out of order. Car is kept pretty tidy under hood.
Fuel Filters replaced in November 2022

I was hoping to catch a code to give me some where to start but nothing written or pending. It started right up this AM and was looking under hood when it shut down. Its just like someone turned the key off.

Thoughts, Ideas?
John

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