well, that was a dead end. i managed to unhook the cable and tested with a 3k ohm load and it was the same. so it was never the probe/cable after all, wished i had been able to get at the plugs back then (it was winter and cold numb fingers couldn't get a good grip). i guess the problem is at the instrument cluster - gotta figure that one out now. anyone out there have tips for an R&R of the cluster?
1993 300e-2.8 - gone now <sigh>
"Do not adjust your mind, it's reality that's malfunctioning"