blahop

IM getting a P0455 and a P0302 Check Engine light. I had a purge valve hose disconnected, reconnedted the hose reset the light and it came back on. When i had it into the dealer last timethey had the air box off, Is there some kind of diagram that details the vacuume lines? IM thinking there is a spliced line that connects under the air box. Car runs rough when first started. Im guessing i have another leak. Gas tank is not preasurized when i take the cap off, the seal looks good on the cap so i dont hink its that. I have a 99 SL600 27K miles.