I've used the standard Pertronix for 5 years or so on M110's and M115's with no problems.

The "Ignitor" II and III sets are not recommended for use with the solid core wires used by Benz.

From the Pertronix web site:

"You cannot use solid core (typically copper) spark plug wires with this product. Solid core wires do not suppress electro magnetic interference (EMT) which will interfere with electronics in your vehicle. A suppression style or spiral wound spark plug wires must be used. "

Best way to get the proper set up is by distributor number.

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