New spark plugs, misfires everywhere. OEM part#
05-25-2019, 04:08 PM
#1
Junior Member
Thread Starter
New spark plugs, misfires everywhere. OEM part#
So i recently installed brand new plugs bosch YR7MPP33 which said they were OEM. I started up the car and i got misfires P0303, 0304, and 0306. Car felt like it was having a seizure. I turned off the car immediately and swapped to the old plugs and the car runs smooth. I checked the gaps to make sure they were .31 like the manual says. So I don't know whats going on. Do I need to disconnect the battery when replacing the plugs so the computer resets? Does anyone have the mercedes oem spark plug part number? I tried calling the dealer and they wont give out part numbers. Should I bother with the spark plugs from the dealer or are the ones i bought good enough? Sorry for the questions, I'm at an impasse with this car.
05-25-2019, 04:38 PM
#2
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14 GLK 250
So i recently installed brand new plugs bosch YR7MPP33 which said they were OEM. I started up the car and i got misfires P0303, 0304, and 0306. Car felt like it was having a seizure. I turned off the car immediately and swapped to the old plugs and the car runs smooth. I checked the gaps to make sure they were .31 like the manual says. So I don't know whats going on. Do I need to disconnect the battery when replacing the plugs so the computer resets? Does anyone have the mercedes oem spark plug part number? I tried calling the dealer and they wont give out part numbers. Should I bother with the spark plugs from the dealer or are the ones i bought good enough? Sorry for the questions, I'm at an impasse with this car.
https://www.genuinemercedesparts.com...ber=0041598103
05-25-2019, 06:21 PM
#3
MBWorld Fanatic!
I was going to do it myself, I found different numbers at different stores and online , it was to confusing, so I went to MB and got a set for my 2013, but now I’m not doing it I’ll let mb replace them. I have a set of MB plugs for a 276.957 motor for 2013 if you want them. Or go to MB and get what they say is correct. The premium price will be worth it.
