i found this one on fastlane O4010-58052 it was call a flap something. this is the same kind that is on my 126. this is rebuildable. you have many other types that probably can't be rebuilt. but it looks like your acc unit pods are the same as my 126. go to fast lane and do your search on your model number. i think you'll find you can rebuild some.

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Thanks Much!
Craig

1972 350sl Red/Blk 117k
1988 420sel charcoal/Blk 140k
1987 420sel gold/tan 128k
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