OK, I'm now in series with pin #1 on the EHA. Key on, engine off, I'm getting 1.12 mA. Driving around, I consistently get from 0.64 mA to 0.72 mA when at idle or giving throttle. When I release throttle, I get ~ -1.50 mA until I return to idle again. At 2000 rpm, I'm getting 0.71 or 0.72 mA.

Does this look reasonable? Is there a problem with the difference at Key on Engine off?

This is all on the 560SL, which appears to be running fine.

__________________
Mike Heath
1988 560SL Black/Palomino
1988 300SEL Black Pearl/Burgandy
1984 500SEC Anthracite Grey/Palomino