Mine has 31K miles. The dealer keeps pestering me for the $600 30K mile service. He wants to do transmission and cooling system service, flush the engine (get rid of oil sludge), etc. My reading of the manual is that transmission and cooling system service is not done at 30K miles. And engine flush is never done, unless the oil change interval is long (I do it ever 3K miles). Am I reading the service guide correctly that these services are not necessary? Is the dealer trying to make his Porche payment off of me?