Please remove and test the distributor cap, rotor, and ignition cables visually and with and OHM meter (multimeter). Do a search for specs I think it's >800 - <1100 OHMS but make sure before you test them. REPLACE anything out of specs. As stated rotor is suspect.

Also make sure the correct spark plugs are installed while you are at it. And test coolant temp sensor for the heck of it.

Good luck with it, PS you may be able to edit the title if you wish (W124)
Acky