GTA Z OWNERS question regarding maintenance checks !

Z11

i bought my Z new and i guess in order for the dealership to keep my warranty intact i have to do the maintenance checks every 3-6 or so months. what exactly do they do at these maintenance checks, how long does it take, and how much does it cost?

im crazy about how clean i keep my car inside and out and most importantly keep it running like a million bucks. but i dont want anyone, ESPECIALLY the mechanics sitting in my car or touching the hood or anything else with there greasy, smelly, dirty hands, they may check the oils and other things and have it spill everywhere under the hood, even a drop and ill freak out on them. lets not even talk about them sitting in the seat and touching the steering wheel. can these checks be avoided? can they NOT touch the car? or atleast have me stand there the whole time to keep an eye out.

especially when the MOTHER FKR salesman showed me my car the first day when i picked it up and he opened the passenger side door and hit the Z next to mine. WTF. i was too excited about getting my car, and i was shell shocked like an idiot and didnt say anything, even though there was no damage, but still, thats fkd up big time, b.c it made me think what else happened to my car before i came to pick it up.

well if anyones still reading my essay, sorry for it being long, can anyone tell me about there experience with the maintenance checks