LANDRTHEGREAT

Took my 2005 C240 4Matic Sedan w/49,000 miles to get a New York inspection. They connected the computer to get the emissions report and would not read. I took the car home and looked up what the drive cycles were that were required to get the readings but nothing would show up on my checked with my OBD2 and got the message "No Powertrain DTCs or Freeze Frame Data presently stored in the vehicles computer. The car currently had the radio replaced using cable adapter and steering wheel connector. No wires were cut. I put the old radio back in to see if things changed, no luck. When I went to check the fuses, the list provided showed space 23 should have vehicle diagnostics but no fuse was located in this space and no terminal was provided for the other side of the fuse. Vehicle VIN is WDBRF81J55F613276. My next move is to do some testing on the OBD port on the car but wanted to see if anyone had any suggestions before a waste a bunch of time.

Update - no power to pin 7 (K-line), resistance on 4 - .5, resistance on 5 - 0.0, resistance on 7 -21.3.

Does anyone know where power for K line comes from? I checked all the fuses and found no issues.