Rick 46

I ordered a new set of sparkplug Bosch H9DCO from DRIVEWIRE INC., and they sendme a set of Bosch HR 9DC+ made in Brasil...Are that sparkplugs good?

RBYCC

They sent you resistors which can be problematic in a 124.

Your spark plug wire has a resistance builty into the connector and the combo with a resistor plug can cause poor running.

Send them back and look for NGK BP5EFS or an equivalent Denso or Beru plug.

Non resistors getting difficult to find in the USA.
I buy the NGK's out of the UK because NGK Europe still makes the non resistors.

Saijin_Naib

My friend with a VW GTI uses NGKs, he quite likes them. Not sure if he uses non-resistor or not but he prefers them to whatever VW had in his GTI stock.

White300sport

I am thinking about trying Nology Silver Spark Plugs, they are made of real silver. They should conduct well,what do you think

RBYCC

Use what was specified...copper, non resistor ....it's the only type of plug that will give you the reliability and performance.

ZorroAMG

White300, stop cross posting, I answered your question in the other thread you made.

White300sport

I am just trying to ask everyone not everyone looks at all post,didnt know this was your personal post zorro.

ZorroAMG

Everyone in the W124 section looks at the majority of the posts, don't get defensive, especially since we've already answered your questions directly or through older posts in a search. Try it.

White300sport

Sorry didnt mean anything bad,thanks for answering my questions.

BoostedCayenne

Anyone tried the Iridium's?????




Spark Plugs: Premium Class

NGK IX iridium 6341 BKR5EIX .032" $7.83


Spark Plugs: Super Class

NGK GP platinum 7090 BKR5EGP .032" $3.15


Spark Plugs: Regular Class

NGK Traditional spark plug 2460 BKR5ES .032" $2.39
NGK V-power spark plug 7938 BKR5E .032" $2.39

BENZBOSS

NGK IX iridium 6341 BKR5EIX .032

All of my cars

TheGerman

The M103 Engine is quite sensitive to wrong spark plugs. It will run on everyone, but best is the NGK BP6EFS. You don't do well to your car with using any type of iridium, platinium, gold or whatever plugs. Save your money, do good to your enginge and buy yust six BP6EFS for normal fuel and thats all you need.
For LPG, you can use a different one, if you need it, i will look into my list...

RBYCC

The "R" in the part number indicates "resistor".
The resistance in the plug confilcts with the resistance in the spark plug lead.
Best performance is always with the specified non resistor plug and OEM spec wires.

I've lived with a M103-12V since new almost thirty one years ago and speak from much experience.

Currently with a twin turbo I run NGK BP6EFS and pull 300lbft of torque on a dyno.

Why mess with success and German engineering of the most over engineered vehicle ever built by MB

JamesDean

does anyone have a source online for these plugs? All I could pull up was the
BP6EF not the BP6EFS ... is there a difference? what does the S mean?

Thanks,

Kris