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 > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 02-24-2017, 05:22 PM
Registered User
 
Join Date: Apr 2005
Location: Northern Louisiana
Posts: 448
2005 E320CDI Code Set

"Supercharger/Turbocharger Overboost Condition". Car is performing perfectly otherwise and has 168,000 miles. Please advise.
__________________
Providing a home for these cars:
1951 Buick Special De Luxe
1977 Rolls-Royce Silver Wraith II
1970 Rolls-Royce Silver Shadow
1986 Mercedes-Benz 420 SEL
2005 Mercedes-Benz E 320 CDI
2012 GMC Sierra 1500 4X4
1927 Pierce-Arrow Series 80
1931 Pierce-Arrow Series 43
1926 Ford Model T coupe
Reply With Quote
  #2  
Old 02-27-2017, 09:20 AM
Registered User
 
Join Date: Apr 2005
Location: Northern Louisiana
Posts: 448
I cleared the code and it reset after a couple of days. This was during very easy driving at less than 50 MPH. As the car is never pushed very much, I wonder if a pressure sensor might be failing, or the wastegate may be sticking? After all, it is 12 years and 168000 miles old.
__________________
Providing a home for these cars:
1951 Buick Special De Luxe
1977 Rolls-Royce Silver Wraith II
1970 Rolls-Royce Silver Shadow
1986 Mercedes-Benz 420 SEL
2005 Mercedes-Benz E 320 CDI
2012 GMC Sierra 1500 4X4
1927 Pierce-Arrow Series 80
1931 Pierce-Arrow Series 43
1926 Ford Model T coupe
Reply With Quote
  #3  
Old 03-05-2017, 05:44 PM
Registered User
 
Join Date: Apr 2005
Location: Northern Louisiana
Posts: 448
Anything?
__________________
Providing a home for these cars:
1951 Buick Special De Luxe
1977 Rolls-Royce Silver Wraith II
1970 Rolls-Royce Silver Shadow
1986 Mercedes-Benz 420 SEL
2005 Mercedes-Benz E 320 CDI
2012 GMC Sierra 1500 4X4
1927 Pierce-Arrow Series 80
1931 Pierce-Arrow Series 43
1926 Ford Model T coupe
Reply With Quote
  #4  
Old 03-05-2017, 05:49 PM
JimFreeh's Avatar
Benz addict
 
Join Date: Mar 2007
Location: Hampton Roads, Virginia
Posts: 3,311
If the true problem is overpressure (vice a bad sensor), perhaps it is related a faulty pressure relief valve, allowing overboost?
Since the car's performance is unrestrained, it suggests you are getting (at least) full expected pressure in the intake.

If it were me, I'd be rigging in a pressure gage on the boost side to verify actual manifold pressure.

Jim
__________________
14 E250 BlueTEC black
94 E320 Cabriolet Emerald green
85 300TD 4 spd manual dark blue
Reply With Quote
  #5  
Old 03-17-2017, 10:40 AM
Registered User
 
Join Date: Apr 2005
Location: Northern Louisiana
Posts: 448
Think I got it: looked at the snapshot ofvthe operating parameters saved when the code was set and all looked normal but the manifold pressure reading at just over 12,000 PSI. I call a faulty manifold pressure sensor.
Reply With Quote
  #6  
Old 03-18-2017, 05:49 AM
Registered User
 
Join Date: Aug 2002
Location: Southeastern PA
Posts: 2,984
Randy, is the pressure really 12,000 psi? That strikes me as unbelievably high. You have a pressure gauge that reads that high? What material is the manifold?
__________________
Fred Hoelzle
Reply With Quote
  #7  
Old 03-19-2017, 10:36 PM
Registered User
 
Join Date: Apr 2005
Location: Northern Louisiana
Posts: 448
No, of course not. Any time a code is set the OBD system records a snapshot of engine parameters. When this code set, it recorded the boost pressure in excess of 12,000 psi, which is obviously impossible and therefore a failing pressure sensor. I have a new one ordered.
Meanwhile after clearing this latest code I completed a round trip of almost 700 miles this weekend, and NO CODE. I am still changing the boost pressure sensor.
__________________
Providing a home for these cars:
1951 Buick Special De Luxe
1977 Rolls-Royce Silver Wraith II
1970 Rolls-Royce Silver Shadow
1986 Mercedes-Benz 420 SEL
2005 Mercedes-Benz E 320 CDI
2012 GMC Sierra 1500 4X4
1927 Pierce-Arrow Series 80
1931 Pierce-Arrow Series 43
1926 Ford Model T coupe
Reply With Quote
Reply

Bookmarks

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 12:58 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