My 560SEL isn't producing any spark at the spark plugs. I used a volt meter to verify the signal to the ignition coil is not being triggered properly by the EZL (the voltage never drops low indicating the coil is not being energized). I also checked that the crank position sensor is operating properly ( it generates +/- 5v ). Therefore, I'm assuming the EZL unit is bad.

Has anyone else had broblems with one? Is there something else I should check? Does anyone know where to get a used EZL unit?

Thanks,
Alan