Won't start until it has sat awhile. Then it runs good for another half hour and stalls out again will not restart until it cools off. Happening more and more as time goes on. Did a search and only thing i can find is possible crankshaft postion sensor problem. Will the CPS be intermttent like this? What else should I check for?

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65 190d sold
85 380SE sold
87 560 SL 180K
84 380SE 96K (mint)