Thanks DG. That is what I did (pushed it all the way in past the "clicks"). I didn't know if that might put too much pressure on the chain. Logic told me that the setting might be at the beginning of those adjusting grooves and then the tensioner would push further in as the chain developed slack.

Todd

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07 E350 4Matic wagon, 06 S430 4Matic, 99 SLK 230
retired W210 (x3), W124, W126