The thing about those pods is if you have ONE that is torn, as soon as the valve opens it, it robs vacuum from the other pods creating havoc. Test each pod individually. I dunno about W124, but W126 valve bodies are subject to bad solder joints. I posted a how-to here on fixing that a few months back.

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-tp


1990 300SE "Corinne"- 145k daily driver - street modified differential - PARTING OUT OR SELLING SOON - PORTLAND OR. AREA - PM ME FOR DETAILS
1988 560SEL "Gunther"- 190K passes anything except a gas station
1997 S420 - 265k just bought it with a rebuilt trans. Lovely condition