Thanks for looking!
I have an intermittent no-start problem with my new to me 93 300E 2.8. It has the later (I think) engine in it with no distributor, 3 coils, plugs and coils underneath cover in valve cover.

It will occasionally fire and die when cranked and then will not start for a while. Happens more often when warm or hot, but has happened when cold. Usually will start after a LONG crank if you press accelerator to the floor allowing more air in. When it starts this way it runs ROUGH for 5-10 seconds and gradually smooths out. Has never quit while running. When stopped at light, after about 5-10 seconds starts to vibrate a little, like idle is too low.

There is proper pressure on the fuel rail when it will not start, within 2-3 psi of normal operating pressure.

Thanks for any suggestions where to look. Can't find anything in the MB CD-ROM manual.

Al

It could be a lot of things but, do a search on the fuel pump relay or the overvoltage relay (OVP), behind the battery. Specially, if you have jumped started the car recently. Other more obvious things to check like spark plugs, wires, cap and rotor, ignition coil, cold start valve.
Happy hunting.

Check OVERVOLT RELAY like Hidalgo said, likely culprit of your problem.

Ditto last 2 replys. Check the overvoltage relay, then Fuel Pump Relay. I Had the same problem. The Overvoltage Relay corrected my problem.

Brian