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Registered
1987 Mercedes Benz 300E
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38 Posts
Discussion Starter #1
hi,
what is the exact spark plug part number for an 87 300E??

thanks guys:)
 

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Registered
1987 Mercedes Benz 300E
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38 Posts
Discussion Starter #3
thanks so much, ill look into it right away.
by the way, are they resistor or non-resistor plugs??
 

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W124 Moderator
86 190E 2.3L 16V, 2 95 320TE's, 02 S500
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12,744 Posts
thanks so much, ill look into it right away.
by the way, are they resistor or non-resistor plugs??
Both options are pure copper NON-resistor plugs that meet OEM specs. I purchase Denso's on Amazon NGK's from clubplug

Jayare
 

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Premium Member
99 SLK230 Kompressor, 5 Speed Manual
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1,117 Posts
I've had very good luck in these engines with various premium copper core plugs. I tend to buy the Bosch, but even Champions work quite well. What you do NOT want to do is use a platinum plug. The center electrode is very thin and occasionally breaks off causing engine damage.

Also, remember that this is an aluminum head engine. Use a VERY THIN coat of copper based anti sieze compound on the THREADS ONLY! Do not let any be exposed to the engine internals.
 

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`86 300e 5spd
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7 Posts
Bosch F8DC4's will work they're OE cu non-res. for m104

if you're adventurous I found some racing plugs at summitracing.com that match the specs of the OE H9DC's that go in the m103.

5/8" hex
14mm thread
.708" reach
copper core
non-resistor

Autolite
AR472, 473, & 474 just different heat ranges 7-9 i think the R is for racing not resistor

NGK
1049, 1085, 3526, 7317, 7841, 7993 varying heat ranges as well

none are more than 3$ a plug. I just ordered a set of F8DC4's from amazon,
but i may go ahead order a set of NGK's from there to see how they do. A little more research may be in order though .
 

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Premium Member
About a dozen 1988, 1989, 1990, and 1991 sedans, wagons, 4Matics and 1 coupe
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5,466 Posts
I installed a set of NGK BP5EFS plugs (new #3712) in one of my M103s back in August. The engine has about 215k on it. So far, so good.
I got them through Rockauto and they were shipped from their UK warehouse via FedEx Intl. Shipping wasn't cheap so I bought 18 plugs at the same time.
 

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1992 300ce, 3.0, 207,00 mi.
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335 Posts
Nice pic of a non-gasket taper seaty plug. Don't use an F8DC4 in your 103 motor. It won't seal properly and will not reach fully into into the comb chamber.
 

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224 Posts
Dealers now have the Beru and NGK's in the supply chain... at least that's what it looked like to me when I got plugs last month.
 

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1987 300e (W124) - 223K miles, 1995 C280 (W202) - 250K miles Sold
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226 Posts

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1990 W124 300E Base
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40 Posts
Wrong plugs for that ignition system, but it goes with the wrong ATF you use.

These are the correct copper core, non resistor plugs I sell, F8DC4

Made in Germany, not Russia like aftermarket Bosch yellow box


Do you sell them through a website or do we PM you for details?
 

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2000 E320 (W210) Obsidian Black
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99 Posts
Spark Plugs - the right ones.

A lot of questions I read on this site can be answered by referring to, of all things, the Owner's Manual. I looked in mine and saw on Page 119 the specs for spark plugs (4 x Beru(?), 2 x Bosch and 1 x Champion).
 
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