I believe it is 000-158-14-35 for the white vacuum line, and 117-078-03-81 for the connectors.

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John

2003 Firemist Red/grey leather SL 500
2015 Palladium Silver/black mbtex GLK 350
1987 Smoke Silver/burgundy mbtex 300E Sportline (SOLD)

Click to see 87 300E