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Old 06-05-2001, 01:59 PM
Robert Boyer
Posts: n/a
I recently replaced the air filter myself on my 420 SEL.
Forgive my ignorance, but I will show it in the following questions:

What is that smaller filter insert on the side of the air chamber?
What does it do, and what is the hose for leading from it?

Finally, what problems might be encountered if that smaller filter unit is worn/dirty, or the hose leading from it is loose?

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