Not heating it at all. And have been running a mix like this of veggie, kerosene and dino diesel for a couple months now...Today is first sign of trouble..Car has been running great even at temps in the 30's...I changed out primary and secondary filters about 2 weeks ago. Primary filter wasn't bad but chnaged it anyways, secondary looked like it was original one that came on car..Didn't know history of car, so wanted to know when it was changed....I wonder if since I don't have the flex pipe from the air cleaner to the boot located on top of the headlights, could the engine be sucking in water through the air cleaner??? It has been rainy here about all day, and one road I have been on has some puddles....

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Looking for another Mercedes 300D or SD as a project vehicle..