Meecedes P0020 Assistance!

2003 Mercedes w/ P0020 DTC

Mornin! My 2003 Mercedes C180 Kompressor, manual drive, 1.8L, with 138k kilometers is throwing a P0020 code. I have:

• Changed engine oil/filter
• Replaced intake camshaft position sensor
• Replaced intake camshaft actuator
• Visually checked wiring

Issue still comes back after a few drive cycles but it always stores in the OBD at 37 KPH. Not sure if that has anything to do with it but its interesting that it always stores at that time. The car starts up and seems to be running fine without any other associated issues.

Does anyone have any tips on this issue or have a wiring schematic so I can start troubleshooting wires? I have very little wire experience but I might as well learn now.

I appreciate the help!