Looks pretty good. I'll try to be as picky as possible and give you my opinions to do with as you like:
I would suggest leaving out or changing the wording of the tag line "Your professional neighborhood auto-care service." The term "auto care service" is much more commonly understood to be a mechanic service. I know the rest of the flyer infers that you mean detailing, but you don't want people calling to check if you also do tune-ups and oil changes.
I would also suggest using two different types of vehicles in your background. Maybe leave the top car as is and put an Escalade, Viper, or Harley below. That would show a little diversity in the types of vehicles you handle. I'd also stick to dark colored vehicles, as the reflections show better at the lower resolution and saturation.
At the bottom, I don't see a need to include your address, unless it is an actual shop. You want people to call for an appointment, not stop by at their leisure. And there's no sense running the risk of being accused of operating an unlicensed business in a residential location. Just drop that and write "Located in Stow Woods...We're in the neighborhood!"
Lastly, I'd drop unnecessary abbreviations. You have plenty of space to write "By appointment only, Monday through Saturday." I would even leave off the word "afternoons." That gives away that you are doing this as some kind of part time side job. People will call not knowing when you have an available appointment, and you can just set them up for the afternoons. They can assume that you have a busy schedule of their neighbors cars all morning.
HTH
Good luck.
--Jim
