Can only assume this is for an 83 300CD?

Isnt the belt tensioned by one of the accessories?

I have an '83 I will be parting out soon, not ready yet. Maybe Jim has one?

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83 300TD (need rear wiper assembly dead or alive)
84 300SD Daily driver
85 300TD almost 400k miles and driven daily.
98 E300D *sold
86 300SDL *sold and made flawless 10 hour journey to new home.