TINAMGUT

HI I have a 2002 ML430 and it turns on then shuts off also on the dash it says START ERROR. sometime with 2 wrench -730d ????. I ve replaced the immoblizer and it still dose the same thing. I ve did some reseach and some say it might be the key I tryied both of them put in new bateries. the remote never worked when we brought the car from my nephew. I also have a brand new battery, we check the fuses, its getting gas. so if any one can give me some of thier knowlegde I woyld really appreiate it
also question is the immoblizer the same thing a tranporter. and also some say it could be the immoblizer antenna what is that and where is it located at.
PLEASE AND THANK YOU