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Old 11-28-2001, 11:25 AM
300EE320 300EE320 is offline
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Join Date: Jun 2001
Location: California
Posts: 326
Sounds to me like it could be a vacuum leak. Are there any other symptoms?

The last time I changed the oil on my 300E I knocked the trans vacuum line off of the intake manifold. It had a rough idle and the transmission shifted harshly. It was a piece of cake to find the problem because shifting was a good hint.

I'd take a look around in the engine bay and see if there's a vacuum line unplugged somewhere.

04 ML500
02 E430

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