1999 C280 Rough Idle,Code:P0300 & 0303.

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1999 C280 Rough Idle,Code:P0300 & 0303.

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12-24-2009, 04:48 PM

mbselect

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Join Date: Dec 2009

Location: Belmont,NC

Posts: 54

Code 0300 is Random cylinder misfire & 0303 is #3 misfire. I believe,it may be coil issue,MAF Sensor &/or ???....Checking on BenzWorld past posts related to C280 Rough Idle,seems to be common MAF Sensor problem with C280....I hope members give some more input before I start process of elimination to correct the Rough Idle & Code problem............Thanks.

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