Correct.

What did you think "Tensioner " meant ?????

It has a pin that extends [ lengthens ] as the chain wears. to keep the chain tensioned ..............
That pin has to be taken out and put back in from the front of the assembly or you will Blow the engine up b/c it will be exrended too far for a new chain.

http://catalog.peachparts.com/ShopByVehicle.epc?q=1989-Mercedes--Benz-300te-Engine--Mechanical&yearid=1989%40%401989&makeid=63%40%40MERCEDES+BENZ%40%40X&modelid=6241%3AMBC%7C1521%3AED%7C10000013%40%40300TE&catid=240154%40%40Engine+Mechanical&subcatid=240315@@Timing+Chain+Tensioner&mode=PA

OK?

__________________
A Dalton