Hello Everyone,

About 2 weeks ago, I purchased a 2003 CLK 500 that was traded in.
The transmission number is 722633.
The car was having issues losing all power while driving.

During inspection, I noticed the pilot bushing was wicking oil into the TCM. The harness and plugs were dripping in oil. I pulled the TCM, opened it, and no oil had made its way inside.
I cleaned the harness and connectors and then went about replacing the conductor plate with a RockAuto unit made by Vaico.
When I pulled the pan off, the fluid looked old but not worrisome, and there was no unusual amount of worn material in the pan.
I replaced the conductor plate, filled the transmission and cleared the codes.

The car drove great for 200 kilometres before the same issues returned, and it sounded like the pump was starving for oil. I dropped the pan again and replaced the filter with an OEM unit. The Vaico unit seemed to have had a bad seal.
I had one of my coworkers perform a transmission adaptation with a Xentry unit, and the car drove great again for 75 kilometres before I lost all power while driving.
The transmission is slipping. I shut the car off for 1-2 minutes, started it back up and was able to drive 30 feet before all was lost again.
I ended up doing this 3 kilometres home, which took about 2 hours, but luckily I was in the area.
I plugged in my launch scan tool that I use on my own vehicles and found the following codes present.

TCM
P2600 Stored: Voltage supply of Circuit 87 has undervoltage.
P2502 Current and stored: The Gear is implausauble or the transmission is slipping.
P220A Stored: The Speed Comparision of Y3/6N2 To Y3/6N3 is Implausable. This is the code I had used to justify replacing the conductor plate.

ECM
P2066 Current and stored: Fault is stored in Component N15/3(ETC (EGS) Control unit. (P0715).
P2069 Current and stored: Fault is stored in component N15/3 (Etc (EGS Control unit.) (P0730).

ESP
C1035 Stored:The Signal From Component N49(Steering Angle Sensor) Is Faulty
C1029 Stored: Fault In CAN Communication With Control Unit N73(EIS [EZS] Control Unit).

Rear Sam
B1078 Current and Stored: Fault In Communication With Component H3/1(Alarm Signal Siren With Additional Battery) Or There Is A Cable Fault.

SCM
B1010 Stored: The Supply Voltage Of The Control Unit Is Too Low (Undervoltage).

After witnessing this Code galore, I removed the alarm siren since it was easy to do, and I expected it to be a culprit in the undervoltage case.
This ended up not changing anything.

I purchased this car as a project, and as someone coming from JDM Subaru, I do not have much experience chasing down electrical gremlins.

The Valve cover is also leaking, which I don't think is related, but hey, it never hurts to include the details.

I am pretty positive this is not a mechanically related issue due to the fact that I drove the car for 300+ kilometres and it was performing and shifting great the whole time, apart from the aftermarket filter issue.

Thank you for reading this novel to the end, and any help is greatly appreciated.