Spark Plugs..1998 C230 ??

What is the normal change out period? I am not sure I have seen it anywhere in writing. I also own a 1993 Dodge Mini Caravan with 150K miles and runs fine and have never changed the plugs. MB now has 100K
and suspect it is time to change the plugs as I am picking up a little "stumbling" lately which doesn't come up as a diagnostic "code alert". I used to change plugs every 10K miles on older 1960 type cars.Thanks.
Larry
Larry
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100,000 miles is long enough to change now... your fuel mileage suffers when you don't change the plug. At today's gas price... it means everything for that stupid spark plugs.
Generally speaking... copper plugs are good for about 30,000 miles... whereas iridium plugs are like 100,000 miles. Use what MB specifies... do not install platinum plugs. Everything else is somewhere in between.
I just looked up your spark plug. Original equipment shows 3 ground electrodes... this is nice but alot of time, multiple electrodes makes engine runs a bit rough... Alternate is single electrode... this can be use without any problem at all. I'd probably pick the single electrode instead.
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Thanks Tiger for you information. Now I am wondering how to take off the spark plug wire. Special tool?? Thanks again.
Larry
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I have not looked at engines in the later model... but most of the time, if it is a wire, no special tool... you have to kinda wiggle in circular motion while pulling it out.
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Hello Tiger: Feeling pretty good about my accomplishment today. Plugs and 2/4 plug connectors changed. Yes it is abit intimidating to open up the hatch to see not plugs but more wires and coils no less. As you know coils are mounted to cylinder 2 and 4. So getting to the plugs and rubber boot connectors requires taking off the coils. The 1 and 3 are standard connections. Took some time to figure a "twist-pull" action required to remove the connector from the coils. Rubber boots cost $20 each and MB Dealer sold me Bosch plugs single 003-159-67-03 $2.90 ea.
Larry in San Diego yes you can do it too and save $400.
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