Yellow98Cobra

I want to change the plugs in my 00 E430. It has 90K miles and im sure they have never been changed. I want copper. Anyone using the NGK's? Or have any suggestions. I know I need 16. Any links or personal experiences would greatly be appreciated.

Paul

lkchris

OE plugs are platinum

No way a "copper" plugs gets a 100K change interval recommendation.

Your owners manual probably tells you the NGK recommendation is PFR 5 R-11.

Yellow98Cobra

Oh yeah, I know the stockers are platinum. I want copper though because they burn better. Ill look up those NGK.

Thanks!

Yellow98Cobra

Okay I found that majority say the Bosch Super Copper plug is what I should go with. But I need a part #. Anyone?

lkchris

The OE Bosch platinum plugs are not the K-Mart platinums you see all the full-page ads for, but rather plugs designed specifically for this engine.

The are F 8 DPER

However, Bosch is eliminating all its nonresistor plugs and replacing them with resistor versions. They say it's no problem.

New plug for your car is FR8DPP33 ... which is something you can look up here
http://www.boschautoparts.com/

Since all this resistor/nonresistor stuff irritates me, I'm switching to Beru
14 FGH 8 DPUR X 2
http://www.kingsborne.com/

The information you have about "copper" plugs is incorrect.

The platinums in question have only a button of plat on the end of the center electrode and on the side electrode. The core remains copper or whatever.

ANY variance from Mercedes-recommended plugs will NOT improve anything--rather it will degrade your system. Neither you nor I have friends who nor is their anyone on any forum who knows more about this than Mercedes.

Quadcammer

lets be real, car makers do things for cost reasons. They don't want to replace spark plugs, and they don't want it to appear that their cars have more maintenance than others.

They throw in "100k" mile plugs, and call it a day.

A copper plug has just as strong a spark as platinum if not more so.

My stock cobra motor had platinums in it. Now with 20psi of boost, I run copper.

Copper plugs work perfectly, at the expense of changing them more often.

E320 Orlando

i recently changed mine, my car has 126xxx and they never been changed before, they really looked bad, im glad i changed them i replaced them with the Bosch Platinum +2 the car runs much better now, they are about 5.00 each and they are not that bad to replace even though there is 12 of them

Tommy_s4

DONT USE BOSCH 4 POINTS!!!!!!! as a word of advice if you do change them every 20-30K they have a tendency of breaking, and thats not good. Btw NGK's are great.

Totalfixation

anyone know if the bosch fusion iridiums are good?

StapleGun

I replaced the plugs on my C43 with Iridiums and I am very, very happy with them. In fact I will use them again. I was very disappointed with the Bosch plus four on my Toyo. In this post I have a 'how to' on replacing the plugs on a 113 motor ---> LINK

Totalfixation

which brand of iridium did you use?

PaulX608

If you would simply read the posts in the link he provided, you would find the answer to your question quite simply and easily.