Thanks to Mike and DJ. The part number brings back "suppressor housing" which PartShop stocks. Not a name I would have ever even considered.
DJ--I notice in your recent exchange with Mike on the 560 SEL accomplishments thread that you seem to have a vacuum schematic in or on your car. I've got a box of new fittings and line (my wife saw the bill last night-ouch) and the same line drawing Tangas has. Where is your diagram located?
Thanks Again for the help.
'89 560 SEL