I agree with most everyone's replies, Customer Service is key, heres an example..
This isnt car-related, but it should help.
I sold cell phones for 4 years for AT&T/Cingular, whatever. ALOT of the times, in fact, every day there was at least ONE customer who would come in with something wrong and it was definitely "our" fault.
I had a guy come in once, with his head literally shoved up his ***. He came in asking about the 1st iPhone and he thought he knew it all. He had researched the plans, the service areas, he was on it. So when he came in, he was like
"I want the new iPhone please, dont sell me on anything else, I just want to be able to use a really cool phone and get my work email"
My response:
"Sir, you don't want the iPhone then"
The key to CS is listening, as soon as I heard him say "work" I knew that phone wasnt for him. The 1st iPhone was not compatible with company e-mail when it first launced so unless he had a hotmail or some other free e-mail account, he wasn't getting jack for e-mail on his iPhone.
He barked a bit, but I simply asked him what he was looking for. Alot of the time, people have the pre-concieved notion that they are going to be dealing with someone who only has thier interest in mind and not the customers. So they come in defensive, and looking for quick, simple answers.
You could start by asking open-ended questions. Instead of "Do you wash your car regularly" which would probably get hit with a "no" or "yes" say "How often would you say you wash your car?"
again, Bad: "have you ever had an auto detail before?", Good: "Your car could benefit from an auto detail, which is different from just your basic wash and wax,for instance, where are some areas of your car that you feel are always dirty"
A question like that, gets them thinking.. "well...I usually go the car wash, but then I have a bunch of water streaks all over my car..OH and when I roll my window down and then back up..I HATE THAT!"
See, now you've established a dialouge, you've completely removed yourself from the "sales" tag they gave you and you've just become thier "Car therapist" haha.
After they start talking to you about thier cars issues, you can then slide in and this is when it never hurts to have a little sample ready...whether it's your car, which should always be in top detail shape, or a little kit in your car where you can detail a small part of thier car on the spot..Visual is key as well remember. Talking is one thing, actions speak louder than words right?
At this point, you've done the hard part. You introduce yourself, let them know what you do, tell them to check out your website, also, just because this is a uinique situation, write on the business card they recieve a 10% discount or something, just to kind of give them that last swift kick in the arse to get them into your shop.
You gotta have personality, you gotta be able to overcome objections, not everyone is going to let you sit there and talk to them about thier car..
if you smoke cigarettes and you see someone else smoking with you by thier car, ask em for a cigarette. comment the car. build from there.
Each situation is different, you gotta be able to adapt.
And as far as that guy went who wanted the iPhone...he walked out with a Blackberry Curve and it was set-up with his work and personal e-mail before he left the store.
He came back 2 months later and bought 3 more blackberrys for his family.
Gotta find what works for you...for me, its listening and overcoming objections without sounding too pushy (like the gym membership guy i talked to today, wasnt hearing me at all..just wanted my money, I noticed a Pittsburgh Steelers notepad on his desk, start chattin about football, next thing you know Im getting a free month membership...giggity giggity!)