Bought a '79 300SD a little over a month ago for a commuter car. been working great until today. Steering got difficult; battery, brake and steering lights came on. Temperature went up. I thought I had broken a belt but not the case.
All the belts were intact. The power steering belt was a little loose but not bad. I started her back up (started easily) and none of the pulleys were turning, not even the crankshaft pulley. There was no smoking or squealing.
Is there a clutch on the crank or something that's screwed up? I can't see how else the engine would run without the crank pulley turning.
Any help?