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Old 01-30-2017, 01:38 PM
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Join Date: Oct 2010
Posts: 18
1998 W140 with Codes P0303 and P0304

My S320 has 220K on it and the check engine light can on for my wife. She was able to get in home stumbling with no power. I checked the codes and it came up with P0303 and P0304.

Is this an issue with the center coil?

1998 S320, 225k, Black on Black
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Old 01-30-2017, 05:35 PM
Join Date: Mar 2016
Location: Los Angeles, CA
Posts: 1,901
Those are misfires from the #3 and 4 cylinder.
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Old 01-30-2017, 07:39 PM
Registered User
Join Date: Oct 2010
Posts: 18
I knew it was a misfire. I'm asking if the middle coil pack runs the third and fourth cylinder on the s320
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Old 01-30-2017, 08:08 PM
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Join Date: Oct 2004
Posts: 3,688


90 300TE 4-M
Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE
Milled & ported head, 10.3:1 compression
197 intake cam w/20 advancer
4 ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff
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