So, what's the labor run (hours?) for a timing chain replacement. I was thinking about having my stretch checked when I have new injectors put in, however...if it costs the same, it's a no-brainer. Same advice apply for the OM603 as the OM617 above?

I'm at a little over 240k with no known replacement.

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1982 240D, sold 9/17/2008
1987 300D TurboW124.133 - 603.960, 722.317 - Smoke Silver Metallic / Medium Red (702/177), acquired 8/15/2009
262,715 and counting