I know what you mean! I too have a 14 yr old!
I remember distinctly when I was 14 and mornings with my mom were less than stellar! I felt so bothered by her interrupting my sleep to go somewhere I would rather not go that I was pretty fresh mouthed and charged to fight. She would be mad, but then I'd go to school.
I was always, always completely perplexed when I came home to my haven and mother with smiles and stories for her, to find her gritting her teeth and frowning at me! What happened to her?! Then she would remind me of what I had totally forgotten--you see, I had seen hundreds of people that day, been taught things, thought about other stuff, but SHE had only had the house and the baby to see so she remembered and fumed.
As a mom, you are an adult, not a peer. You are right to require respect. Ignoring your child does not cause him to respect you--it causes him to think you dislike him and he will distance himself from you, maybe forever.
Don't greet his growlings with indignation and frowns. You smile, you be pleasant--he can't control you with his childish ways, you choose to be and act how you want to.
Some afternoon when you are both interacting pleasantly, broach the subject of mornings, and make it clear that you want to be spoken to respectfully--even if he doesn't feel like it. Let him know plain and simply that if he is rude again then you will discipline him. Make up your mind now what that will be--no ride to friends house, or take away his ipod for the day, or whatever.
Reinforce that you love him. Maintain always your smile for him and pleasant words. Don't be petty, but strengthen that backbone of yours for when he fails--he is a child and will not get it perfectly in one day--it may take a month or so of you sticking to your guns, but he will get the picture and grow up.
When a teenager sasses mom, it is not a sign of major relationship and character strain. It is a single incident of childishness and lack of self control. The whole day may be made up of incidents! Your job as a mom did not end with potty training and shoe tying lessons, it still is hard work of patiently teaching right from wrong within the safe context of your home until he is ready to start real life on his own in a few short years. Make the most of them!
Always talk to your son! :) It shows you love him unconditionally.
God bless,
A.