2000 mercedes c230 error code 5400 is showing.
I know she needs some kind of lubricate because of the way she sounds. I
cannot find the error code in my manual. She is a compressor c230.
The 5400 code converts to OBD code C1400
I don't know what sound you hear but you should check all the lubricants. Oil, transmission fluid, power steering, differential, etc.
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