Thank you for the reply
My mechanic is more of a BMW specialist than Mercedes. He did tell me that he will be looking at the coil tomorrow, as well as looking into replacing the cap and rotor. (it is probably time for those anyway). The next thing he suspects (like I mentioned) is the module. I hope its just the coil.
Naturally any further suggestions are appreciated.
In the meantime, I will hope for the best.
-Larry