WAG - A temp sensor? Or, a vacuum leak that opens up with heat? Do you have to wait for it to cool back down before you can restart it?

You can test your temp sensor values with a multimeter. If you search here you can find the values chart....

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-tp


1990 300SE "Corinne"- 145k daily driver - street modified differential - PARTING OUT OR SELLING SOON - PORTLAND OR. AREA - PM ME FOR DETAILS
1988 560SEL "Gunther"- 190K passes anything except a gas station
1997 S420 - 265k just bought it with a rebuilt trans. Lovely condition