Joey,
Diesel timing chains can last any given amount of time. I would have the chain checked pre-purchase and determine if replacement is necessary. On both of my diesels, I am still going on the original timing chains. The 240D at 300K and my 300SD at 170K. As a rule of thumb, diesel timing chains tend to last much longer than gasoline engine chains. Hope this helps!
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Rgds,
Aaron Greenberg
MB technician
'67 250SE Cabriolet
'77 450SL
'79 6.9
'79 6.9
'80 300SD
'81 240D
'85 380SE
'89 420SEL
'93 300E 2.8
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