1998 E280 (auto) Saloon.
Although it looks as new (brilliant silver)the old girl has been around the
block a few times.
In fact she has done 125K,so I decided for the first time to have the main
done by a non merc "specialist" .
Very good all round service and great saving.
The guy told me that there were "non platinum" plugs in the car so he
replaced with similar ones.
He did mention that the platinum were quite expensive,and (have I got this
right?)12 were required.
I am curious about this, any information welcome.
Non-platinum or regular spark plugs cost about US$1 to $1.50 each.
Platinum tipped spark plugs cost about US$2.50 to $4.50 each, depending
upon the number of electrodes - which is probably more about marketing
than performance, IMHO.
The platinum sparkers are claimed to outlast the regular ones - why else
would anyone buy them?
Suggest you check the Owner's Manual for the engine's sparkplugs'
specification so you can specify what's to be installed next time.
Not sure about your engine. But on my 96 C280, the M104 6-cylinder DOHC
engine requires the exact non-platinum resistor spark plugs. I once
used Bosch platinum and that will set Check Engine light every few days,
one or two of the cylinders not firing correctly. I learn that the
circuit requires the plug resistance at a narrow range.
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