I had this happen, luckily I caught it early. I turned the crank slightly in the other direction then carefully "milked" the chain back over the driver's side cam then the passenger side cam. I may have also had to roll the passenger side cam back one tooth, but can't recall for sure as it has been a few years now.

Both ends of the chain have to stay in contact with the passenger side cam, especially when working solo. Tom Pindelski likes to use vise grips, I prefer zip ties. I started using zip ties after having the chain jump on me.

__________________
Mike Tangas
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72

'02 CLK320 Cabriolet - wifey's mid-life crisis

2012 VW Jetta Sportwagon TDI...at least its a diesel

Non illegitemae carborundum.