My ABS works and I cleaned the sensors a few years ago. I was under the car yesterday looking at the solenoid/valve and it's pretty crusty. Not sure if this system is "smart" enough to self-test components and report problems. Or the computer is shot which would explain why I can't get blink codes.

What is SNG?

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'95 E300D 279k 717.411 5-speed swap 40 MPG
'78 240D Turbo 144k
'83 240D 201k