Right near the firewall to the left of the fusebox (standing in front of the car) and right basically on top of mast. cyl, there are some vacuum lines, with a connector that splits the lines, etc--another which runs to a rubber thing with only one line going into it--I can hear vac hissing in this area. Normal? What are these lines for, the cruise control? (Which works fine, by the way)

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2002 Mercedes-Benz E320 4Matic
1995 Mercedes-Benz E320 Wagon
2005 Land Rover LR3 V8 SE
1999 Audi A8 4.2L quattro

No, not normal at all. trace the sound and replace
hoses or connectors.

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joel

Prayers bring forth enlightenment.