You need to check out the ignition module and coil. Secondary resistance seems too high to me, although I don't have the specs in front of me.

If the EZL box is going out due to heat, it won't spark, but it could just as easily be the crank posistion sensor.

The factory diagnostics tool will tell you, if you can find one to plug in.

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!