My advice is to start practising your
to all of the crap that they will try and push on you. Not sure how your dealer is but it may get so bad that you will likely be so sick of saying
that you will want to say
to something - don't do it. Not sure if this is true for all auto dealerships but the financing managers at a few places I've dealt with left a bad taste in my mouth. Like I just wanted to get the car and get the heck out of there.
If the 17's with all season's is what you want I would give your sales guy a call ahead of time and see how he reacts and see if you can work out the deal ahead of time rather than last minute. Decide what you want before you go in there and stick to your guns. Hopefully it will be a pleasant experience for you.