Checked codes last night. Same set for the EA/CC, 3, 6 and 11. Checked TCM (trans control) - code 4 (I think) - description is CANBUS communication with EA/CC distorted. That explains why I've got no 5th. If the transmission can't communicate with the throttle, it probably denies 5th gear.

The CC being inop is probably related to the problem that's causing the TCM to complain about the CANBUS.

I've verified that the brief full-throttle activity at key-on is new, as yesterday I felt it under my foot on the throttle - never have felt that before.

Erased all the codes for the EA/CC. Shut key off, and turned it back on. Checked 2 minutes later and #3 is back again.

Couldn't erase #4 from the TCM. I'm guessing as soon as it's gone, it comes back again.

I guess my rooting around in the throttle actuator has messed something up. I can't see how opening the harness would have any effect, especially when the wires are pristeen and I didn't cut anything.

I know where there's a 93/94 S320 that's wrecked. I'm gonna check EPC to see if the part #'s are the same and see if I can strike a deal for the used actuator. Lots better than the $1,400 I'm facing at the dealer.

UGH.