I decided to change my spark plugs this weekend. From reading the threads here, it looks like the correct plug is the F8DPP332. My local parts house says that the FR8DPP33 has superceded it. When I asked if this other plug was resistive(because of the "R"), he said yes, they have gone from non-resistive to resistive for this application . Dealer uses Beru 14FGH-8DPURX but unable to tell from Beru website if this is resitive or not. Getting them from Phil would take too long as I would like to replace them this weekend. I'll try to plan further ahead next time.
Any comments? Thanks, Dan

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2012 E350 Bluetech

Go to dealer and buy the plugs. I purchased a set of Bosch plugs from the local dealer for an M104, $2.50 each.

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2016 Corvette Stingray 2LT
1969 280SE
2023 Ram 1500
2007 Tiara 3200

I may end up getting the plugs at the dealership. The price difference is $14.50 at dealer vs $7.50 at the parts house, ~ $90 after tax. If the Bosch plug from the parts house is good to use then I would rather save the bucks. However, I will make sure whatever I put in there is the correct plug.
I did find a spark plug cross reference chart which crosses the Bosch FR8DPP33 from the parts house with the Beru 14FGH-8DPURX from the dealership. It just seems weird they would suddenly switch to a resistive plug.

Thanks, Dan

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2012 E350 Bluetech

forp, call your local MB dealer and ask a Service Advisor what the proper spark plug is for your engine. If MBUSA switched to a resistor plug he should know ... perhaps there's a TSB regarding the spark plugs.

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Fred Hoelzle

Bosch made the CHANGE not MB! They are completely stopping production of non-resistor plugs.

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MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

If Bosch are stopping prodution, how are we supposed to replace plugs in cars that need non-resistor type plugs?

Should we be stocking up on plugs now, or are there alternatives we should use?

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Steven Harrison

1993 300E2.8 - 196K
2001 E320 4MATIC - 86K

Could somebody please post some reliable online sources for H9DC/H9DC0's? I recently ordered what I thought were the last two available plugs at the time via a worldpac reseller (not fastlane) but later found out that they sent me HR9DC0's instead. Now they want me to pay for the shipping back despite it being their error, even though I already had to pay $23 to have the wrong plugs sent to me along with some other stuff!

You may be able to get the correct plugs here,
http://www.honolulu.mercedescenter.com/mbcenter/b/index.jhtml
Good Luck, Dan

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2012 E350 Bluetech