Sounds like timing chain stretch, no? Line up the dots on the cams, then read the balancer. Past 4° and a new chain is required.

http://www.w124performance.com/docs/mb/OM60X/OM60x_Timing_Chain_TSB.pdf

http://www.w124performance.com/service/w124CD1/Program/Engine/605_606/05-6010HA.pdf

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Dave
Boise, ID
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