have a prob need help

I was driving my car today and the service engine soon light came on and wont go off. I only have 4200 miles on it and never been to the dealer for service before
I hope it goes well.

my question is this I have a ECIS CAI on it do you think I should put back the original before bringing it into service
and is their a way I can see what code is coming up
what tool do I need
I guess I will have them change the oil while they are at it.

I bought it at haberstad BMW on jericho

if anyone has ever had their car serviced there how was it

thanks
Frank

this sucks I dont want any problems with this car
my luck the dealer will scratch it or something
its dirty too because of the weather I hope they take care of my baby lol