Hello all MBZ fans out there.

I have a 1993 190E (USA/California) that dies OR goes into a idle, intermittently. Here are the two cases:

1) I'm driving at any speed and the engine goes into idle for ~10-15 seconds, then dies. No lights come on my console telling me something's wrong until the motor dies, and then they all come on. The motor will NOT start-up for another 2 minutes. I've tried cranking and cranking, to have it fire up after 2 minutes. I've also tried just waiting 2 minutes, and it then fires up.

2) I'm driving and the engine goes into idle for ~10-15 seconds, and then suddenly I get a full return of power. No lights come on my console telling my anythings wrong. It's like I took the foot off the gas for 10-15 seconds, but I didn't.

My mechanic (he does only Mercedes) has tried swapping out a computer type of module, then a relay which connects somehow to that same computer module, and today a cable & sensor that somehow senses the position of the motor (goes to the back of the motor & connects to that same computer module). Still the car does the same thing.

It could go 4-5 days without the intermittent dying, and then it could happen 2-3 times in a day. I usually do 110 miles a day.

There's no connection between engine temperature, empty/full gas tank, type/brand of gas I use (use 91). It doesn't idle rough or run rough. It starts right away.

My mechanic doesn't believe it's the fuel pumps - they were both replaced about 7 months ago.

Any ideas?

Thanks for reading.

Possible FP power

http://catalog.peachparts.com/ShopByVehicle.epc?q=1993-Mercedes--benz-190e--.3-Body--Electrical&yearid=1993%40%401993&makeid=63%40%40MERCEDES%2DBENZ%40%4063%40%40MERCEDES%2DBENZ%40%40X&modelid=6132%3AMBC%7C1485%3AED%7C10000009%3ASM%7C846%40%40190E+2%2E3&catid=241959%40%40Body+Electrical&subcatid=241990@@Fuel+Pump+Relay&mode=PA

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A Dalton

What you're describing is probably an OVP swap, a crank position sensor and the computer itself.
Like Arthur said, replace the fuel pump relay and see what happens.
If that doesn't fix it, post again and let's see what else is wrong.