Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Vintage Mercedes Forum

LinkBack Thread Tools Display Modes
Old 09-05-2018, 11:26 PM
280EZRider's Avatar
No Dumping
Join Date: Jul 2007
Location: Medford, OR
Posts: 1,447
W123 Dreaded Vacuum Leak

18 years ago I replaced all door vacuum actuators and the primary in the drivers door, plus the gas flap and trunk actuators . Recently a vacuum leak has arisen that allows the locking system to only function occasionally. The leak can be heard behind the instrument cluster, so I replaced the check valve and tested the rubber connections, but the leak still persists. Has this ever happened to anyone?

Don't Chrome them; polish them
Reply With Quote
Old 09-06-2018, 07:46 AM
optimusprime's Avatar
Trevor Hadlington
Join Date: May 2014
Location: Worcestershire in England
Posts: 1,210
May be to do with the swich to higher and lower the head lights . Or even the controls for heater flaps . You need a mitevac to check out all the small bore vac hoses .Any leak in the vac system will cause your problem .
Reply With Quote
Old 09-06-2018, 07:54 AM
ejboyd5's Avatar
Registered User
Join Date: Aug 2004
Location: Southold, NY
Posts: 255
If you can hear the leak and trace it to a particular area you are well along to fixing the problem. Just think about the leaks you can't hear or are in remote locations such as that tube that feeds the gas tank fill lid. Dig into the instrument panel and you will find it.
Reply With Quote
Old 09-06-2018, 10:59 AM
meltedpanda's Avatar
Certified Benzaholic
Join Date: Mar 2003
Location: Central Ky
Posts: 6,116
if all of the vacuum functions are affected , look to the vacuum canister and conenctions there. If localized look to the connections just before the problem area, and for sure check the diverter in the drivers door, the aftermarkets are prone to failure
2011 Porsche Cayman - Bond,James Bond
99 E320 THE Queen Mary
62 220b - Dolly - Finally my Finny!
72 450SL, Pearl-SOLD
16 F350 6.7 Diesel -THOR
07 Lexus RX 350 - Lexi
14 38HP John Deere 3038E Tractor -Mean Green
84 300SD, Benjamin -SOLD
71 220 - W115-Libby ( my first love) -SOLD
73 280 - W114 "Organspende" Rest in Peace
81 380 SL - Rest in Peace
Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 01:59 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page