check enigne light, misfire
 

hey, my check engine light came on yesterday and it pulled 3 codes, the forst one was cylinder 5 missing , the next was cylinder 6 missing, and then it said multiply random cylinder misfire. Please if anyone had the same problem or any suggestions reply asap. I was thinking if that could be just the park plugs, and does anyone know which ones should i go for and how hard is it to replace them. thanks

What model?

it is a 2000 ml 320, sorry

hey, another question, what grade fuel do you all use for a ml 320, it is a 2000. thanks