-Run guaranteed to pass/seafoam bottle through your tank
-Smog your car hot...Really Hot...
-Remove Air filter before smog.

it will help a bit.

To compare

1. When I Failed


2. After Doing above (Engine heat was so much that you feel it 3 feet away with Hood open)


3. Last year First attempt (Changed plugs, New oil day before smog test, Ran through half bottle of seafoam through intake)

__________________
1) '04 S500 Gold/Beige......120k Miles
2) '93 300E 2.8...Green/Tan MBTex..........202k Miles(and going)
3) '89 420SEL...Light Blue/gray Leather....155k Miles (Retired )