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To answer your question first, it is of course possible but I would change bank 1 against bank 2 solenoid to see if failure follows.
Newsguy's hint is also valid, there is a vid from LN-Engineering that shows how to replace these rails. My indie did that for me as well (same engine and mls) with engine in the car, no need to drop it.
You can verify it quite simple by pulling the oilfilter, cut it open and inspect it for brownish particles that point to these detoriated rails. After that replace filter + fill up housing with engine oil until filter is soaked with oil and level does no longer drop (~400ml) and install housing.
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