I read somewhere in the forum that we should not use a Resistor type plug in my SL500-5.0 V8.

I am confused by the following description on the NGK web site.

Can someone clear this up for me?

"NGK strongly recommends using resistor spark plugs in any vehicle that uses on-board computer systems to monitor or control engine performance. This is because resistor spark plugs reduce electromagnetic interference with on-board electronics.

They are also recommended on any vehicle that has other on-board electronic systems such as engine-management computers, two-way radios, GPS systems, depth finders or whenever recommended by the manufacturer.

In fact, using a non-resistor plug in certain applications can actually cause the engine to suffer undesirable side effects such as an erratic idle, high-rpm misfire, engine run-on, power drop off at certain rpm levels and abnormal combustion."

Thanks

For the last 30-40 years MB has suggested against using "normal" resistor plugs..but now that Bosch has re-designed their complete line of spark plugs using "Yttrium" to add life to their plugs they are now suggesting use of THAT style resistor plug...

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Thanks M.B. Doc, if what you and NGK is saying is true-and you owned my 96 SL500, what plug from Bosch would you recommend then.

Thanks