My indy recommended that the timing chain needed replacement. He described the job in general and said that the tensioner could be turned (cranked) in until it released pressure on the chain. I have looked at the MB instructions for the job and 05-310 only discusses removing the tensioner.

Does the tensioner need to be removed or can it just be turned in? Any other hints on this job would be appreciated.

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