The vacuum valve is bad....need replacing...and to do it it requires that you remove the dash...so if you decide to do it, you may as well replace them all while you're at it, and consider the whole thing....afterall, that's not a job you want to do twice...

This link may help you: http://www.peachparts.com/shopforum/showthread.php?postid=526705#post526705

I know this one will, it shows the piece that's bad on your car....: http://www.peachparts.com/shopforum/showthread.php?t=131908

Good luck, if you want to do it twice, my wifes 300D needs this done....

__________________
1998 W202 C230 - The money pit of late.
1984 W126 300SD (356,800 miles) Gone to the wrenchapart
1984 W123 300D Gone to the wrenchapart
1972 W108 280SE 3.5 (sold but not forgotten)
1986 Buick Grand National 3.8l Turbo (86k miles)
1966 Glassic Model 'A' Replica http://www.glassicannex.org

http://banners.wunderground.com/weat...Round_Rock.gif