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 11-22-2014, 04:06 AM
marko606's Avatar
Registered User
Join Date: Nov 2012
Location: Las Vegas, Nevada
Posts: 17
1998 e300 turbo diesel low egr vacuum

I'm having a problem with low vacuum at egr valve. All rubber hoses were replaced. At the egr valve and on the turbo side. When measured, vacuum holds at 5 mmHg at idle at the egr transducer... 15-20 mmHg is needed to open egr valve. There is 25 mmHg vacuum at the brake booster. There is good vacuum just not at egr or waste gate transducers. Vacuum line t's off into the firewall on passenger side. Vacuum diagram in the engine compartment states "other users" for that line. Where does that line go? My ac has been acting strange too. I am puzzled and tired. Don't feel like pulling my dashboard out just yet. Please help... Thanks.
Reply With Quote
Old 11-22-2014, 08:30 AM
Control Freak
Join Date: Oct 2011
Location: Columbia, SC
Posts: 3,244
The "other users" on a 210 are the climate control damper actuator pods. There is a "harmonica" valve behind the dash, that controls the pods. I suspect you have a leak in the climate system. I think you can pull the glove box liner and find the harmonica like you can in a 124. Then it's time to break out the MityVac.

I suspect if you cap off the line heading to the passenger compartment your EGR function will return to normal.

The 210 does not use vacuum to run the transmission like earlier models, it is all electronically controlled from the computer.

Door locks and rear headrest dump come off the PSE pump under the back seat on a W210.
2014 ML350 Bluetec (wife's DD)
2008 E320 Bluetec (my DD)
2008 ML320 CDI (Older son's college DD)
1998 E300DT (Younger son's college DD)
1987 300TD sold to vstech
gone but living on
1983 240D (body to greazzer, engine to t walgamuth)
Reply With Quote
Old 11-24-2014, 01:47 AM
marko606's Avatar
Registered User
Join Date: Nov 2012
Location: Las Vegas, Nevada
Posts: 17
I appreciate that info. I'll look at it and report after I'm done replacing the steering rack.
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 02:57 AM.

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