I finally got my CPS in last night. I noticed the sensor that was in the car had a part number ending in 171, and had both Bosch and Mercedes part numbers on it. The new one had no MB part number but the Bosch number ended in 170.

So after struggling getting the bolt back in, it fell into the depths of hell (into the heat shield). I spent an hour using picks to pry it out and I couldn't find my darn extending magnet I have just for situations like this. So I spent another hour running into problems with components in the way of taking the two retaining bolts out of the bellhousing.. But I eventually got it!

Not a single symptom on the first 12 minute trip, on the way back it missed again maybe three times (which is ultimately minimal) and no CEL. I see improvement but I feel it's only a matter of time before it grows unbearable again. I'll research coil pack testing and plug wire testing to see if I can do that on my own. And maybe rent a fuel pressure set from Autozone.

I feel optimistic though, I'm getting closer to having this finished and having my beauty back.

I thank y'all so much for your input to get me back on the road, this is invaluable to me. I don't think I've had a bigger smile on my face since I got the car in the first place.