1999 Mercedes ML320 P0400 - rough idle - PeachParts Mercedes-Benz Forum

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1999 Mercedes ML320 P0400 - rough idle

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02-22-2004, 10:40 PM

Cigar Havana Cigar Havana is offline

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Join Date: Jan 2003

Location: London Ontario Canada

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1999 Mercedes ML320 P0400 - rough idle

If you have a rough idle and get a P0400 in a 1999 Mercedes ML320, the problem may not be the EGR valve.

Check the rear intake it maybe partially clogged with carbon.

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