OK, the drive was not that bad. It is a slug when the RPMs are less than 2500 to 2700. My engine red lines at 4300 RPM.

The 606s must red line higher than mine.

The logic for the EGR signal in the 606s includes that RPM must be less than 3000. I bet on my 603 it is 2500 RPM or so.

The RPM part is probably what was confusing me.

-Jim

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1995 S350D, Green with black leather interior.
Bought January 2008 w/ 233,xxx miles.
I did 22,000 miles during the first year of ownership.