This is not a problem to repair with the engine disassembled. A competent machinist can bore the cylinder and put in a dry sleeve then fit to the piston.

It would be advisable to check the other cylinders, bore and/or ring as required and do a valve job while it's apart. This is not much beyond a typical engine overhaul.

Hope this helps.

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2001 SLK 320 six speed manual
2014 Porsche Cayenne six speed manual

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