Your best bet would be to check the chapter's website for that area for contacts &/or social media - they may have a Facebook group page, for instance.
While I don't feel comfortable doing it myself, you might certainly ask the people at Strictly BMW to do a PPI. Strictly is just around the corner from Landmark, their # is 425-747-6044. They are a BIMRS.org member and I've used them for 30 years. Lots of BMWs around there (Bellevue BMW is about 1/2 mile away): two miles to the Microsoft campus, and Bellevue is a very affluent suburb.
Hi All, I have recently bought my 2007 BMW 335i and joined CCA today. Could you please suggest places you guys visit for mechanical issues with the car in Bellevue area other than BMW Bellevue because i visited BMW last week and told them that my ride was little slow and there was lag in the first gear they did diagnosis and charged $250 and said there was no issues at all. But i know for sure the ride was not as expected.
The BMW Pugetsound Car club Facebook page might have some great input for you. https://www.facebook.com/groups/398882953797851/