Thanks for that, I guess I'll be calling the shop tomorrow and see how the ignition module was diagnosed. I don't want to seem as though I'm checking up on them, though, and if he tells me how, I just wonder if I'll know enough to determine whether what they did was the "right" thing or not. Can't run the EPC on my computer, it's not advanced enough based on the minimum system requirements. Good to know there's a break, though, guess I can get any unit up to '89 M.Y. Now I guess I'll start looking for a new coil, wonder how much Mercedes is going to soak me for that? You say under $70? That's not bad. I do have a guy in California sending an ignition module for test purposes which, if it works, he'll sell me for $300. And, I hate to buy a new coil for that "test" unless we know for sure it's the ignition module that's at fault. I can see this is turning into a nightmare scenario. How DOES one properly diagnose a failure of the ignition module?
Thanks for all the help.
Tom in Tulsa
'88 300E