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Old 01-13-2003, 07:31 AM
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Question 1996 C-280 EGR Valve

Dear Friends:

I have a 1996 C-280 with intermittant drivability problems. I suspect that the EGR valve is sticking. Where is this valve located, how do I get to it, and how hard is it to replace.

Thank you,

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Old 01-13-2003, 08:13 AM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
If the EGR system malfunctions you will get a "check engine" lamp the next time the engine is started.
What type of running problem is the engine having??
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Old 01-14-2003, 08:24 PM
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Dear MB Doc:

The check engine light is on. The car performs fine at speed, but will not idle well. This is intermittant, but seems to be more frequent when I have been pushing it harder.

I can correct the problem by shutting the engine off for even just a second. Then it idles fine.

Where is the EGR valve located? How do I get to it?

Your assistance is much appreciated,

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Old 01-14-2003, 09:36 PM
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Join Date: Aug 1999
Location: Florida / N.H.
Posts: 8,768
Chassis 202.028 has a TSB up-grade for the EGR valve due to sticking.

They also have a flow blockage problem that you can find in the Archieves. [ DIY article by S.B ]

The blockage is more apt to bring up the CE lamp as it is a constant failure , whereas the sticking egr will sometimes not CE indicate cuz of it's intermittent condition. [ thus not having successive faults needed for ECU recognition]
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