talk to anyone who knows about mercedes or bmws and they will say the same thing...platinum plugs are not only junk, they could in fact harm your engine..remember bosch was in league with lucas at one time so they are not without doubt at times...never use platinum...pure marketing

 

ridiculous platinum plugs last 100k single side electrode ngk 7090 bosch 7422

 

I build,race and drive both makes.ohlord

 

So if anyone knows it is me.

 

Where do people come up with this crap

 

bosch platinums are junk...look at any owners manual and see, the cores crack very easily and cause misfires....

 

ngks are even worse...just stick with what the manual says...don't get fancy is my advice. i had a bmw 635 that required silver tips...$10 each...tried to bypass them and didn't work...had to pull them withina month a do the right thing

 

all has to do with heat rise and decay...wrong plug..wrong result

 

Bosch platinums are what the manual says and NGK are also listed as oem.
we are talking about the m112 ans m113 engines are we not?
Earlier copper plugs were fine in the early engines.Stick to them if that is what you are talking about.The modern high compression long fss interval engines run great on platinums single side electrode.
ohlord

 

Bosch platinums are junk????????????????
I run them in all out race engines,never a failure.They are oem plugs in all modern Mercedes.
I am afraid you have no knowledge at all to back up your claims
ohlord