My fuel economy has finally reached 23mpg averaging 75mph. The car still had trouble starting on two occasions after changing the O2 sensor and OVP. I tested the resistance on the crank position sensor and the values ranged from 830-2350 ohms. The specification was 600-1300 ohms, so I changed the sensor and now it is running and starting much better. I know several people said to change the sensor, but I did not want to change the sensor before performing some sort of verification test. Now I am working on vacuum leaks. Thanks, Bob.

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1987 Mercedes 260E (W124) 213,000 miles
1971 MB 220 w/ 4 spd manual (W115) "Suzy" (sold)