Thanks so much for the photos! I have a question for you:

I want to do the checks described here: http://www.europeantransmissions.com/Bulletin/DTC.merc/97-20.pdf

It looks like that's the side of the valve body facing the filter. Does the valve body need to come off to do those checks?

Thanks,

-J

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.