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Old 12-05-2009, 10:49 PM
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Join Date: Dec 2009
Location: Spokane, Wa
Posts: 4
M103 Ignition wire problem!

Disclamer: I tried very hard to find the answer to my question both on the internet and in some of the limited service literature I have. I just can't seem to find it.

I have a 1993 300E 4Matic with the M103.

I had a serious misfire and I discovered that my spark plug wires (most of them at least including the coil lead were crispy). I ordered new bosch wires and attempted to change them out one at a time, I ended up not doing them one at a time thanks to the impossible clearances. I got the plug wires confused and realized that they weren't even put on in the firing order, the car ran, but not well.

I made a second attempt at attaching them in order trying to remember where at least one of them attached, now the car won't start at all, leading me to believe that either my assumption that they are put on in order of the firing sequence is incorrect (doubtful) or that my guess on where #1 goes is incorrect (likely).

Your help and suggestions are greatly appreciated, If anyone can produce some sort of diagram/drawing on which wire goes to which terminal, that would be most excellent. I need the car to run before sunday night!!
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