Bummer
My first trip to the dealer at 2500 mi, was for 1) Brake squeal 2) XM only works 25% of the time 3) Nav computer locks me out 4) key fob intermittently didn't work and 5) wind noise.
They kept the car for 9 days, and told me that the fob should be in the right pants pocket to work, which it did.
Nothing else was fixed.
Next visit I demanded a rental Cadillac (promised at sale time).
All of a sudden, they were able to fix everything except the brake squeal and XM (doesn't work in the New York City area, no matter what or they refuse to replace the bad unit) in two days, with car available evening of the 2nd day.
I suggest you make them pay for wasting time, even if you don't need the rental.
The Deville was a pig, with a really mediocre stereo--I don't want or need it, but you need the "cash incentive" for the liar, I mean Dealer to "get some hustle".
:reddevil