Did not drive the 91 300E w124 for the past 10 days or so... very wet weather, lots of rain.
Disconnected the battery, because I suspect a phantom battery drain.
(Ongoing saga with the electrical in the vehicle:

Electrical issue close to getting solved?

Check engine light - on after key out!)

Thought I was getting close to solving with the #9 fuse clue - today being a nice sunny day, I decided to drive it - it stumbled a bit at first, but after warming up, seemed fine.

After a short ride to the dental office, it would not start when I tried to go home.

So it is stuck in the parking lot.

It cranks, but will not turn over. Not a normal sounding crank, like stumbling.
(Reminded me of the sound when the OVP needed to be replaced).

I checked the fuses in the OVP, both were ok.
Checked the pressure in the gas tank, not much there when gas cap was removed.

A nice lady who was driving a MBZ, stopped to give me a ride. She mentioned that it sounded like a fuel relay failure that happened to her once.
She said to tap on it, and it may fix it to at least get home.

Could it be the fuel relay? Sounds like fuel is not making it to the engine?
Don't know, suggestions please!

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1991 300E 124.030 103.983KE 722358 03 412178
207K

1979 240D 123.123 250K (Project car)

2000 Ford Ranger, 187K

2015 Dodge Ram 1500 EcoDiesel 37K