The vacuum diagrams in the shop manual (see 80-260 and 80-900/901) are pretty good. Get a mitivac and a couple of golf tees. Then lift the carpet under the passenger's feet and check the circuits one at a time against the diagram. As I recall, all the circuits except the left rear door lock can be checked there. The other possibility is a leak or bad check valve under the hood just above the oil filter housing. Other good stuff to have on hand are a couple of spare rubber "Y" couplers and "X" couplers and especially some rubber hose. A leaky vacuum storage tank takes patience because it takes a lot of pumping to build up any vacuum so a leak also bleeds down slowly.
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Zeitgeist Sent: Friday, March 30, 2007 22:16 To: Mercedes Discussion List Subject: [MBZ] Notes from the field: 123 vacuum issues So, my el cheapo '84 300D has become a hot commodity for our 21 yr old daughter who recently had her parked Volvo 7-series totalled by an inattentive driver down in San Diego. This car has been driven almost daily by my wife, but has been severely neglected by me, due to its unfortunate penchant for utter reliability, and my disdain for working on the 123 chassis. I know it needs lots of front end work, 'cause it chews through tires at an alarming rate (inners wear really quickly). And, the doorlocks and IP shutoff are slow to respond, if at all. My daughter is flying up on the 2nd, so I have very little time to diagnose and treat. Are there any readily available reference materials out there for fixing a vacuum leak in the door/shutoff circuit? Any obvious leakage points I should address first and foremost? I recently replaced the driver's door vacuum switch. TIA _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
