Eh....it is a cool job. Better than anything else to do when you are 17. I wouldn't go as far as "dream job" though. The appeal of it is usually higher than what it turns out to be.
Needless to say, you still might have trouble getting a job doing this at some dealerships. I know the policy when I did it was you had to be 18, but my best friend's dad was the GM there at the time and hired me and friend on.
It is cool to wash the cars and everything, especially driving them. We had another lot down the street so we always go to take the cars down there which was a blast. We also had the fun of taking S2000's for premium gas until they put a stop to that.
Now, here are the downsides as far as my job went. Now, looking back these seem kind of petty, but they pissed me off at the time.
-We stayed until the LAST person left the dealership. If they were even working a deal, we stayed an hour to three passed closing time waiting for them to buy the car just so we could wash it.
-Everyone is pretty much your boss. The salesman act like your boss. Your bosses are your boss. The service writers are your boss. The only cool people were the techs and the owner of the dealership (ironic).
-It is very monotonous after a while. Sometimes we would wash 100-200 cars on nice days in the summer and it is just....eh.
-If it is a high volume dealer, you WILL be there every Friday and Saturday, especially come the end of the month. Plus, refer to the first point as well on these days. It kind of kills the weekend....
So, if you do this. Try to work mornings and get off in the afternoon so you do not have to deal with all of that bullshit. That is what the two guys we worked with did and they were happy as fuck to walk out of there at 5 as the other two of us had a line of sold cars to do.
Other than that, we sat around and drove cars and fucked with the mexicans we worked with.
Fun times especially working with a friend.
Maybe someone can hook you up off of the board, but I am sure as far as insurance policys go you have to be 18.
Hope that helps.