So I just moved my shop so I am going through a bad case of "what box did that get put in" I cannot find my multi-meter, it was harbor freight unit anyway, may have been tossed in the move, so I have not done any voltage tests.
However I have a test light. Should I have 12v at both terminals on the coil? I thought one of them was the "negative"
New coil, new Mercedes OEM plugs (yes they sell the correct non resistor ones), and still nothing really. I sprayed some ether in the intake and it hits lightly a time or three, but nothing really.
I have two used .980 EZLs and both behave exactly the same way. One is unknown from the junkyard, the other is the one out of this car, which noone has seen run in 3 years.
I have read a few old forum posts of guys putting M102 and M103 EZLs in M104.980 cars. They say they will start and run, but won't rev past like 4,000rpms. That would however be enough to diagnose dead EZLs and give me the confidence to drop $500 on a used unit on eBay. A friend has a spare M103 EZL or two that I am going to go borrow and try.
I am currently looking up the 124 FSM to see if Mercedes sheds any light on the mystery that is the M104.980.
Interesting FSM pages on what the EZL is and what it does, but I don't see in here how to test it.
http://www.w124-zone.com/downloads/MB%20CD/W124/w124CD1/Program/Engine/LHIS/15-0020.pdf