Thanks a lot. With the engine on, I can hear vaccuum hissing out of the broken connector--I'm getting a new one this weekend at Holloway Mercedes in Manchester (I see you're in Milford!) and hopefully this will solve my climate control problem.

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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