I have a 2000 ML320. The online stores offer several different plugs. I want OE and my owners manual says "F8DPER" but several threads say "F8DPP332". I believe that its a 2-electrode plug(?). Anyone know for sure the number and style of the plug?
thanks.

Updated: I pulled one plug out. The original F8DPER Bosch plug has "one" electrode. Still not sure what the new number "F8DPP332" has.

PS get this: my dealer's part department refused to give me the number. They said "we have them in stock for $20.xx. Come buy them, I won't give you the number"