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Old 04-01-2008, 11:19 PM
Texholdem
 
Join Date: Mar 2007
Location: Dallas
Posts: 756
Pictorial DIY: M104 - EGR vacuum line replacement - OBDII Code P0400

If your CEL is on and a code P0400 is thrown then one of the causes can be that ...
Quote:
vac is not getting to the egr and on a 104 that is usually just a broken white plastic vac line that runs across the front of the engine [ under that front plastic cover]..notorious fault b/c they crack from heat fatique and then the EGR can not open b/c of no vac, thus setting the code.
The simple fix for that is to just to replace that plastic line with a generic rubber one.....a $2 DIYer fix.

Arthur Dalton














Since everything was open, I replaced the vac line for air injection as a prevention too. Material cost $6.-.

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1996 E320 since 1/16/08, 171K miles as of Feb 2011

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1989 300CE - R.I.P. Dec 29 2007
Other MBs (sold): 1992 300E-24 - 1979 350SLC - 1984 230E - 1990 300CE

Last edited by Texholdem; 03-05-2009 at 08:21 PM. Reason: typo
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Old 05-04-2009, 02:43 PM
unkl300d's Avatar
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Join Date: Jul 1999
Location: San Francisco, Ca
Posts: 2,315
Great post THANKS


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1979 300D 199 K miles
1995 C280 95 K miles
1992 Cadillac Eldorado Touring Coupe 57K miles
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1979 240D 140Kmiles (bought for parents) *SOLD.
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