Are you sure the car is a 90?

There are 2 systems I know about.

If the car has a EZL it should have a single coil and distributor. My 91 300SL M104 3.0-24 Valve has this. The fuel control is Bosch K jet / CIS

If the car has multiple coils, they are triggered by the engine computer. My 97 SL320 M104 ME 2.1 engine control.

I had though the 93 - 96 HFM -SFI had multi coils and used engine computer to trigger the ignition.

Sorry, typo on my part. It is a 1995 S320. Do you know which module in the box is the ignition? I'll post some pictures here in a minuite.

Drivers side fender well:


Computer Box:


Close up:

I defiantly DO NOT have an EZL. I traced the coil signals back to this module and I can say with near 100% certainty that it is the ignition module.
Here is the unit that is controlling the coils:


One thing that really got me off on a wild goose chase was that the coil connectors don't use the center pin as signal and the outer sheath and ground. EXACTLY the opposite.

That metal band around the center pin is the coil signal:


These three pins are where the coil leads end up (Black Sharpie on tips):


What a good coil input signal looks like:


Now I just have to find a replacement module from someone that won't rape me. Anybody got one in their junk box from a boneyard trip?

Update: A. Dalton straightened me out on the circuit for the coils. The center pin of the coaxial connector is +12VDC and all three are wired to the same point in the harness (that's why my clumsy ass thought it was a ground while snooping around with my Ohm meter and no schematic). The outer connection is what goes back to the ECM which switches the ground path on and off to fire the coil.