[calamityj]

That, plus replacing corrosion prone tin fuses with copper, should take care of some electrical gremlins, or at the very least establish a baseline to work from. I had similar issues with a distributor cap hairline crack, whenever it got a bit wet of even humid (+ check the contact spring top center.) Actually cap & rotor are the first things I change after getting an older car. Fuel filter(s), you have on your list, plus fuel pressure should be checked.
On gen II = 91 and later 190E 2.6 there is no longer a separate fuel pump relay, but a big MAS behind the battery.
When my engine died for no reason in my 91, another 2.6 specific MAS from the wrecking yard has been doing the job for the last 6 years.
In my experience, just throwing new parts at an issue can become more costly than having an experienced mechanic diagnose and fix the issue in the first place.
If you have self service wrecking yards in your area, trying used parts doesn't cost that much.

edit: another time, an idiot mechanic snoozed to tighten the nut on the bottom of the distributor, and the engine stopped.

Where can you find COPPER torpedo fuses???

 

[calamityj]

So happy for ya'll... wish Helga would come back to life...( had an appointment with mechanic in the best place in this area.. she has been parked there for three weeks and not touched...?? wth? We off-loaded her and gave all the info... have not heard a word. Should I be irritated? or call and politely ask about it? OR... shoot em down like a Chinese spy balloon?)

 

[calamityj]

Your slow get down and sort it out ..he thinks he as a car for S/ F/A.

I'm sorry...what is S/F/A mean?? Thank you for your response..husband tells me to "be patient" ( as he pats me on the head)....

 

[calamityj]

Calamityj Well i would go down to the garage where you left your pride and joy , and talk to them in a masterfull voice . But they might have a good reason why your car is not done .Good luck .

Thank you.
In

 

[calamityj]

Thank you.
In

It is ready soon

 

[calamityj]

Calamityj Well i would go down to the garage where you left your pride and joy , and talk to them in a masterfull voice . But they might have a good reason why your car is not done .Good luck .

Hey! Got the car back last evening... lots of $$$$ but OEM Mercedes Benz parts on the old girl. Labor was about the same amount as parts... then had some custom exhaust changes... She runs really well. Smooth/quiet/quicker... but somehow my euro headlamps are not working... could be the H4 bulbs went out... but that is not a big thing.