Hatterasguy is correct, platinum plugs just don't work well in these engines. I have been there, done that and they don't work as well as the single electrode coppers. (A voice of experience)

Haasman

__________________
'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)