There’s another thread in the full member forum, similar question but “Washington State”. Search the membership list for CraigD and ask him. Also search that same list for all members in WA and make personal contact. Remember not a high percentage of our membership makes regular visits to our forums, so your question may not be seen. But report back here when you find one!
Someone mentioned Kent Bergsma in Bellingham. However if you go to his website, Mercedessource you’ll see that what he mostly does is sell things and make videos. They don’t even take phone calls. Personally I would find it extremely difficult to send a car to a shop that I can’t call… so it’s really uncertain whether or not they want any business with cars coming in to repair, restore or maintain. But go to his website and ask the question.