Thanks for all the info so far. My '91 190e 2.6 (120,000) which has been running perfectly until it suddenly just shut down on the hiway (No cough, sputter, or hichup). Trying to restart (hot or cold) gives some promises and occasionally 5-10 seconds of smooth running before a sudden shutdown. I replaced the OVP relay and nothing changed. The '91 does not have a fuel pump relay (fuel pump is now controled by the KE unit--I think). I am now going to check the dist. cap and rotor as well as the fuel pressure. Am I going about this the right way??? Does anyone have another suggestion before I get REALLY dirty. Thanks in advance.