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C280Sportster
03-26-2005, 09:25 PM
None of my local stores carry the OEM Bosch spark plugs. I only have tomorrow (Sunday) to change them. So, I need the second best choice. My local stores (Advance Auto Parts and Pep Boys) have:

NGK Plat.

Autolite Plat.

Denso iridium ($7)

They also have Bosch +2 ($3.99)


Which one do you recommened?
C280Sportster
03-26-2005, 09:45 PM
Some local choices:

Bosch 4418 See image and details for this item
Platinum+4: M112.920; Do not Gap
Lifetime Replacement Warranty
Find in a store
Ships in 1 day
Weight: 0.2 lbs.
$5.99


Bosch 4301 See image and details for this item
Platinum2 Plug: Gap Pre-Set; For 4418
3 Year Replacement Warranty
Find in a store
Ships in 1 day
Weight: 5 lbs.
$3.99


Bosch 4301 See image and details for this item
Platinum2: M112.920; Do not Gap
3 Year Replacement Warranty
Find in a store
Ships in 1 day
Weight: 5 lbs.
$3.99


Autolite Ignition 3924 See image and details for this item
Standard Spark Plug: Gap .040
2 Year Replacement Warranty
Find in a store
Ships in 1 day
Weight: 0.1 lbs.
$1.28


Autolite Ignition APP3924 See image and details for this item
Premium Spark Plug: Double Platinum; Gap .040
5 Year/ 50,000 Mile Warranty
Find in a store
Ships in 1 day
Weight: 0.4 lbs.
$3.97


Autolite Ignition AP3924 See image and details for this item
Premium Spark Plug: Platinum; Gap .040
3 Year Replacement Warranty
Find in a store
Ships in 1 day
Weight: 0.1 lbs.
$2.48


I think the:

Autolite Ignition APP3924 Premium Spark Plug: Double Platinum; Gap .040

May be the best choice.
jnenad16
03-26-2005, 11:22 PM
I would go with bosch platinum +2.

nenad
jnolte
03-27-2005, 02:28 PM
dont Denso Iridium give you more horsepower? i would go with those..
Metromoto202
03-27-2005, 05:41 PM
i agree with the Denso Iridium or the MB Iridium that go in the new M11 motors. I've never heard mine idle so smooth.
MikeL
03-27-2005, 06:32 PM
Bosch Platium plugs are crap, I wouldnt use them. NGK's are better. Brabus uses NGK plugs in all their Brabus'ed out MB's.
C280Sportster
03-31-2005, 08:29 AM
Originally posted by Metromoto202
i agree with the Denso Iridium or the MB Iridium that go in the new M11 motors. I've never heard mine idle so smooth.

They did not have Denso Iridium's, so I had to go with NGK.

"NGK 6341 See image and details for this item
Iridium IX Plug; BKR5EIX; DOHC; @ Gap Preset @"

I believe the gap is set at .32 which is what the MB manual says.

Will these plugs work ok?