722.6 trans...does this sound like a symptom of a bad conductor plate?

[Matt300ZXT]

I'm looking around at possibly purchasing another W210 and not afraid of turning wrenches on them. There is one that isn't too terribly far away, an E430 with 125k. They say on their ad it was running/driving last week but now when put in gear, they say it feels like it's in neutral and won't move. I know the transmissions are practically bulletproof and it probably is the conductor plate or electrical connector not doing its job since the miles are pretty low so it's not high mileage wear and tear. Anyone on here that's much more familiar with the 722.6 failing want to give me some insight?