Hi,
You have your hands full with this one. I reviewed the codes and the one that stands out is the P0500. That is indicating a breakdown in the CAN bus system. I would suggest checking total resistance in the under hood can system. I have a feeling there is an open circuit.
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Here are the directions for testing. The attached pic correlates with the directions.
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2003 Mercedes Benz C 230 (203.040) L4-1.8L SC (271.948)
Test 4A1: Perform Measurement at Component X63/4 (CAN Databus Adapter Connector, 2-Pin)
Vehicle ALL Diagnostic Trouble Codes ( DTC ) Testing and Inspection P Code Charts P0500 [1] CAN Message From Control Module Traction Systems, Vehicle Speed Signal Implausible Test 4: Resistance Test of Engine Compartment CAN Test 4A: Test Total Resistance of Engine Compartment CAN Test 4A1: Perform Measurement at Component X63/4 (CAN Databus Adapter Connector, 2-Pin)
TEST 4A1: PERFORM MEASUREMENT AT COMPONENT X63/4 (CAN DATABUS ADAPTER CONNECTOR, 2-PIN)
Perform measurement at component X63/4 (CAN databus adapter connector, 2-pin)
Test total resistance of engine compartment CAN
Figure legend
Pic 1
- X63/4 (CAN databus adapter connector, 2-pin)
Test sequence
- Switch off ignition
- Measurement with multimeter
- (X63/4) 2.22.1 (X63/4)
- Adapter cable no. W220 589 00 99 36 may be used.
Specified value
- [55.65] ohms
Question: Is the measured value within the specified value range?
No
- The measured value is not o.K.
Possible cause and remedy
- Cable from component N3/10 (ME-SFI control module) to component X63/4 (CAN databus adapter connector, 2-pin)
- Test terminating resistor of component X63/4 (CAN databus adapter connector, 2-pin).
- Test terminating resistor of CAN element in control module N3/10 (ME-SFI control module).
**End of test**
Yes
- The measured value is o.K.
**End of test**
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Let me know what you find.
Joe
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Wednesday, October 21st, 2020 AT 6:57 PM