My 1998 e320 started misbehaving. I've been working on it off and on for a few months. Now that I need the car, I can't drive it.
Pulled codes in May got a P0400 so I cleaned out the EGR.
Fixed the code issue, but not the rough running.
Realized battery was weak from sitting, put a charge on it, and it holds the charge.
Now car won't keep a steady idle. Runs rough, speeds up and then stalls (cutting a fart in the process)
So I made a video and posted it to youtube
https://youtu.be/FB0r20uRVc4
Additionally, after I start the car, if I press on the accelerator, I cannot get a steady RPM, and it doesn't seem to matter how much I press on the pedal.
Oh and one more thing, the O2 Sensor may be faulty, but I thought it was just a fine tuning trim O2 sensor. Car exhibits these condition when first started. It also seems like the very first time I try to start the car it doesn't start. 2nd attempt starts and runs rough.