Jeff, she already gets a maintenance dose of Redline SI-1 about 3 times a year.

Correction on earlier test result: I posted the wrong data for my airflow sensor (B2) result. Sorry for the confusion. I initially tested the coupling by error and got the results I posted. In fact, the correct proc is to test the sensor pins themselves. The correct result there was 4.2K ohms against specs of 3.6K - 4.4K ohms, so that's OK. However, upon throttle depress, the resistance climbs OK but then does not come back down as I continue to depress up to WOT. I don't know what to make of that. Similarly, the idle speed test of the throttle valve switch (S29/2) is supposed to go to infinity upon throttle depress, and my test result there was 38.7K ohms. To me, that's a failed test. Do others agree, or should 38,700 ohms be considered high enough to be infinity, in which case the test is satisfied?

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1988 California version 260E (W124)
Anthracite Grey/Palomino
Owned since new and still going strong and smooth
MBCA member

Past Mercedes-Benz:
1986 190E Baby Benz
1967 230 Inherited from mom when she downsized
1959 220S Introduced me to the joys of keepin' 'em goin'

There are only 10 kinds of people in the world--those who understand binary and those who don't