I have a 1985 300d turbo diesel with 219,000 miles. It is running great, with good acceleration and (I think) a normal amount of engine noise. I think it has always been well cared for. The timing chain is original. I am the third owner.

My local mechanic tells me I should replace the timing chain. He says he has seen these timing chains break in the 250,000-mile range, requiring an engine rebuild. My old mechanic across town feels this is unnecessary.

Please let me know what you think.
Thanks!
-Joe