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Old 01-07-2003, 09:50 PM
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Mike Murrell Mike Murrell is offline
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Join Date: Feb 2000
Posts: 2,141
MB makes a special tool(pliers) for removing the resistor tips from the spark plugs on a 103 motor(your car).

I'm not saying that you must use one of these gadgets, but they simplify that task. The ceramic inside is easily damaged and that can cause rough idling/misfire.

If you're lucky, you might try to reseat the resistor. If it's damaged, you can replace the resistor tip vs. the entire wire as you may be accustomed to with domestic/asian models.

It screws on and off fairly easily. The pliers are available at:


If you are going to perform basic maint. on your car, there are about $50 worth of special tools that will come in handy. They are outlined in the catalog available at the web site above.
Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC

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Last edited by Mike Murrell; 01-07-2003 at 11:17 PM.
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