MB does not state if timing chain stetches X degrees then timing chain should be replaced, it does say about the use off offset woodruff keys for compenstation, how much would it take to stretch before ultimately jumping teeth(disaster). I read some posts as little as 5 degrees and others that say the chain will outlast the engine if oil is changed every 3,000 miles. So what is the answer??

Chaosmosis
'73 MB 450SL