That doesn't sound good. Have you checked your oil and transmission fluid levels? If not, do so before you drive any further. Something other than diesel fuel must be burning.

Maybe this link will help:

https://dogandlemon.com/articles/ownership-issues/diy-diesel-problem-diagnosis#:~:text=Blue%20smoke%20is%20caused%20by,is%20usually%20caused%20by%20either%3A&text=Constant%20blue%20smoke%20on%20a,by%20worn%20valve%20stem%20seals.

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Graham
85 300D,72 350SL, 98 E320, Outback 2.5