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 > Diesel Discussion

LinkBack Thread Tools Display Modes
Old 06-01-2002, 06:27 PM
Posts: n/a
fuel flap vacuum leak

I just did some troubleshooting on my vacuum system and discoverd that the fuel-flap lock leaks vacuum badly. I just bypassed it for now, but am wondering if these are repairable. I can't see anything wrong by just looking at it.

This is for an 85 300CD. Is the device the same as for all 123s?

Thanks for any info.

Reply With Quote
Old 06-01-2002, 07:07 PM
MVK MVK is offline
Registered User
Join Date: May 2002
Location: Queens, NY
Posts: 447
Check ************************ they have few rubberdiaphram for vacuum element repairs.
Also check

They have rubber diapharm for door vaccum elements used in ACC. Give them a call may be they have some suggestion for you. Also as a final shot before replacing the whole unit, see if the leak is very small can can be pinpointed on your diaphram, then you can try using a similar rubber patch and use rubber glue to patch the whole up. I read somewhere it worked on a guys car for 5 years or so.
Good luck
One penny saved is three penny earned.

1985 300D Turbo 179,000miles
Reply With Quote
Old 06-01-2002, 07:22 PM
franklyspeaking's Avatar
Registered User
Join Date: Dec 2001
Location: Decatur, Alabama
Posts: 383
I used a balloon to slide over a door diaphram once. It worked for several years. Sometimes you have to get creative to avoid spending big bucks.
1998 C280
1982 240D Manual - Sold
Reply With Quote
Old 06-02-2002, 01:41 AM
Registered User
Join Date: Mar 2002
Location: S.F. Bay Area
Posts: 502
vacuum leak


The new vacuum units can't be rebuilt as they're sealed. However, if you can get one of the older units and install it they can be rebuilt just by installing a new diaphram. You may have to drill new holes to install the older model. I collect the older units and when I have a complete set, I retrofit one of the family's newer 123s. The older units actually move the door locks up or down faster as well. If you check prices, you'll see the five dollar diaphrams are much cheaper than the new sealed units.

Reply With Quote
Old 06-06-2002, 06:52 PM
Senior Member
Join Date: Jul 2001
Location: San Antone
Posts: 408

What year(s) W123 do you mean by "older" having the rebuildeable vacuum locks?

America: Land of the Free!

1977 300D: 300,000+ miles

American Honda: Factory Trained Technician & Honor Grad.
Shop Foreman;
Technical Advisor to Am. Honda;
Supervisor of Maintenance largest tree care co. in US for offices in Tex.
Reply With Quote
Old 06-07-2002, 08:02 PM
Posts: n/a
That hole mechanism is only about $10 or $12. I replaced the one on my 240D in a few minutes in spite of the fact that it is difficult to reach.

Easy one, go for it.

Have a great day,
Reply With Quote
Old 06-08-2002, 08:51 AM
Posts: n/a
Originally posted by LarryBible
That hole mechanism is only about $10 or $12. I replaced the one on my 240D in a few minutes in spite of the fact that it is difficult to reach.
Fastlane is $27.90. Where did you get it for $10-12?


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 11:57 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, 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