starts for about 4 seconds then stalls.replaced fuel pump, filter regulator and

Only new code in the dla is #226 previous codes are #s 231,416,417 &419 Please let me know your thoughts thanks, Dan-quickpicsphoto well real bad news, brought my benz to the best wrench in tahoe. Code p1570 shows and if i under stand correctly it is anti theft and cannot be cleared,except at certified mercedes. It will cost more than the vehicle is worth.Is there truth to this . Please let me know that my sl500 is or isn't a oversize paper weight