My 1991 560SEC motor decided to momentarily quit running on a return trip from Florida about 6 months ago It started, about 2 hours into the trip, quit then ran for an hour then quit and again ran for a while. By the time we reached Gulf Port for the night it was quitting and not firing up again after its then normal 1 to 2 second pause but would restart right away. I got to Texas and home, and had my mechanic friend look at it. His solution was to change cap/rotor/wires/plugs and the neutral safety switch. He also tightened the ignition switch as the tumbler was loose.
None of these solved the problem. Shes still is unreliable and cuts out from time to time. We had planned to substitute the Ignition Control to see if it would make a difference. We can not find the proper ignition control unit to try this tactic. The MB number is 004 545 5332 [02] and the Bosh number is 0227 400 624. Is there any cross reference on the control units available as to which can be substituted? I am thinking of sending this unit to Programa for bench testing. I called them and they said they dont list the unit in their rebuilt items list, and I haven't found an aftermarket site that does. I have also determined that I get some AC voltage from the crankshaft position with the ohmmeter. The car runs so the coil works but the hesitation is the same as if a chevy coil 12v/8v wire is broken and intermittent. Any thoughts? Can Programa bench test the unit? Its $100 to send it to them plus the ups costs. Any help would be appreciated.
None of these solved the problem. Shes still is unreliable and cuts out from time to time. We had planned to substitute the Ignition Control to see if it would make a difference. We can not find the proper ignition control unit to try this tactic. The MB number is 004 545 5332 [02] and the Bosh number is 0227 400 624. Is there any cross reference on the control units available as to which can be substituted? I am thinking of sending this unit to Programa for bench testing. I called them and they said they dont list the unit in their rebuilt items list, and I haven't found an aftermarket site that does. I have also determined that I get some AC voltage from the crankshaft position with the ohmmeter. The car runs so the coil works but the hesitation is the same as if a chevy coil 12v/8v wire is broken and intermittent. Any thoughts? Can Programa bench test the unit? Its $100 to send it to them plus the ups costs. Any help would be appreciated.