EGR Valve, engine whining sound? - Mercedes-Benz Forum

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post #1 of 1 (permalink) Old 11-11-2009, 06:56 AM Thread Starter
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Date registered: Nov 2009
Vehicle: 2000 S430
Location: Atlantic City
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EGR Valve, engine whining sound?

I used to Code Scanner to find out that I need to replace my EGR Valve. I bought the valve and have a couple questions. 1) does anyone have a diagram of where the EGR is on a 98 E320? 2) I have heard a high pitch "whining" sound from under the hood for a while now, not brake related. Is this noise the bad EGR valve?

The Code Scanner also told me that i have a bad O2 sensor, which seems easy to replace, would that be "whining" as well?

Thank you for the reply.
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