Hoping you guys can help with a maintenance question... my car is nearing 30K miles and Watson says I need a 30k service package which is approx $600. However, after reading the owners manual, it basically says just have some inspections(exhaust, etc.) done and I'm thinking probably the passenger cabin air filter replaced. That's no where NEAR what the service guy told me. What are you guys doing? I do have the extended warranty and don't want to void it but just seems what they are recommending is excessive.