Well, I replaced the cap and rotor and took the car for a little ride. It ran and didn't fail!! Drove about 20 miles, starting and stopping to check it all out. Cleaned the spark wire ends and lubed with dielectric grease, both ends.

THANK YOU EVERYONE for your help!!

You saved me and ended my frustration. This is my daughter's car and we've traded so she can get back and forth to college. My regular car is a '93 300D and I prefer the diesel, frankly. She does not, however. I've been driving my wife's CLK430 and, while it's a nice car, it's just not for me.

Dave