"A little knowledge is a dangerous thing"....My best advise to you would be to learn as much as possible about your VX, read a lot of the postings here(a lot of the problems you will, or might get, with the VX should be answered here).
Learn as much as you can it can save a lot of bucks.
Unfortunatly a dealership is a money making corporation, I hope the Service Manager is a nice guy and refunds your $80.00.
John