Does it happen if the ACC is in the off position? If so, it is the
aspirator fan. If not, it is the blower fan. I believe I have a used
124 fan that needs brushes if you want to fix one up, then swap.
Otherwise: new or car-part.com.
Karl Wittnebel via Mercedes <mailto:mercedes@okiebenz.com>
December 12, 2017 at 9:55 AM
Passenger side Seems different than the main AC fan, but I can't think of
what else might be under there. Sounds like someone killing a small animal.
For about a minute and then it stops. Before I order a new cabin air fan,
thought I would ask the peanut gallery.
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